a hypothetical gas which obeys Boyle's law exactly at all temperatures and pressures, and which has internal energy that depends only upon the temperature. Measurements upon real gases are extrapolated to zero pressure to obtain results in agreement with theories relating to an ideal gas, esp in thermometry

If you refer to a way of doing something, you are referring to how you can do it, for example the action you can take or the method you can use to achieve it.

(of a singer or musician ) able to sing or play without making any errors

In grammar , the past perfect tenses of a verb are the ones used to talk about things that happened before a specific time. The simple past perfect tense uses 'had' and the past participle of the verb, as in 'She had seen him before'. It is sometimes called the → pluperfect .

Your body is all your physical parts, including your head, arms, and legs.

a game in which no batter on the opposing team reaches first base

A gift is something that you give someone as a present.

Someone who has perfect pitch is able to identify or sing musical notes correctly.

516 sheets of paper

rhyme between words in which the stressed vowels and any succeeding consonants are identical although the consonants preceding the stressed vowels may be different, as between part/ hart or believe / conceive

Something that is perfect is as good as it could possibly be.

The shape of an object, a person, or an area is the appearance of their outside edges or surfaces, for example whether they are round, square , curved, or fat .

You can refer to a particular place as a spot .

A perfect storm is an unusual combination of events or things that produce an unusually bad or powerful result.

→ the perfect tense

correct in every detail

denoting a tense of verbs describing an action that will have been performed by a certain time. In English this is formed with will have or shall have plus the past participle

correct in all its letters, or in every respect

a style of binding used mainly for paperback books, where the backs of the gathered sections are trimmed and inserted into a cover along with adhesive to hold the pages and cover together

a cadence , immediately preceded by some form of dominant harmony , and consisting of the tonic triad of the key of the particular section or of the composition in its beginning , with the keynote appearing in both the highest and lowest voice

An excuse is a reason which you give in order to explain why something has been done or has not been done, or in order to avoid doing something.

an integer , such as 28, that is equal to the sum of all its possible factors , excluding itself

A particular setting is a particular place or type of surroundings where something is or takes place.

a quantity which is the exact square of another quantity; e. g ., 25 is a perfect square of 5, x 2 +2xy+ y 2 of (x+y)

Timing is the skill or action of judging the right moment in a situation or activity at which to do something.

perfect or flawless

In grammar , the present perfect tenses of a verb are the ones used to talk about things which happened before the time you are speaking or writing but are relevant to the present situation , or things that began in the past and are still happening . The simple present perfect tense uses 'have' or 'has' and the past participle of the verb, as in 'They have decided what to do'.

Something that is an antidote to a difficult or unpleasant situation helps you to overcome the situation.

The backdrop to an object or a scene is what you see behind it.

detestation of past sins and a resolve to make amends , from love of God

If you say that a man is a gentleman , you mean he is polite and educated , and can be trusted .

→ past participle

If someone has a platform , they have an opportunity to tell people what they think or want.

a market situation in which there exists a homogeneous product, freedom of entry , and a large number of buyers and sellers none of whom individually can affect price

An illustration is an example or a story which is used to make a point clear.

a verb form including the auxiliary have followed by been and a present participle , noting the continuation of an activity or event, its incompleteness or interruption , and its connection to the temporal point of reference , as in I've been waiting for over an hour , They had been talking about her before she came into the room , or In July , he will have been living here for two years

the tense of a verb that indicates that the action has been completed

If you talk about the condition of a person or thing, you are talking about the state that they are in, especially how good or bad their physical state is.

If you say ' practice makes perfect ', you mean that it is possible to learn something or develop a skill if you practise enough. People often say this to encourage someone to keep practising.

rhyme between words in which the stressed vowels and any succeeding consonants are identical although the consonants preceding the stressed vowels may be different, as between part/ hart or believe / conceive

You can use in an ideal world or in a perfect world when you are talking about things that you would like to happen , although you realize that they are not likely to happen.

a hypothetical gas which obeys Boyle's law exactly at all temperatures and pressures, and which has internal energy that depends only upon the temperature. Measurements upon real gases are extrapolated to zero pressure to obtain results in agreement with theories relating to an ideal gas, esp in thermometry

the ability to identify exactly the pitch of a note without comparing it to another

a style of binding used mainly for paperback books, where the backs of the gathered sections are trimmed and inserted into a cover along with adhesive to hold the pages and cover together

对(對)某人/某事完全合适(適) duì mǒurén/mǒushì wánquán héshì

决(決)不完美/决(決)没(沒)有帮(幫)助 jué bù wánměi/jué méiyǒu bāngzhù

( colours, clothes ) 很/非常相称(稱) hěn/fēicháng xiāngchèn ⇒ Helen's choice of lipstick was a good match for her skin-tone. → 海伦选的唇膏和她的肤色非常相称。 Hǎilún xuǎn de chúngāo hé tā de fūsè fēicháng xiāngchèn.

对(對)我来(來)说(說)他完全是个(個)陌生人 duì wǒ lái shuō tā wánquán shì gè mòshēngrén

完成(时(時)) wánchéng (shí)