as soon as possible

full speed ⇒ 警车全速前进。 Jǐngchē quánsù qiánjìn. → The police car is driving at full speed.

accelerate

quick ⇒ 面对突发事件,当地政府做出了快速反应。 Miànduì tūfā shìjiàn, dāngdì zhèngfǔ zuòchūle kuàisù fǎnyìng. → Local government reacted quickly to the sudden turn of events.

rapidly ⇒ 经济形势急速恶化。 Jīngjì xíngshì jísù èhuà. → The economy is deteriorating rapidly.

at top speed

incredibly fast

swift

sketch

speed

take a crash course ( pt took ) , pp taken ⇒ 计算机速成班 jìsuànjī sùchéngbān → a crash course in computers

fast action ⇒ 用这种方法减肥有速效。 Yòng zhè zhǒng fāngfǎ jiǎnféi yǒu sùxiào. → You will see quick results with this diet. ⇒ 速效止痛片 sùxiào zhǐtòngpiàn → fast-acting pain killer

dissolve quickly ⇒ 速溶咖啡 sùróng kāfēi → instant coffee

take shorthand notes ( pt took ) , pp taken ⇒ 我非常羡慕会速记的人。 Wǒ fēicháng xiànmù huì sùjì de rén. → I really admire people who know shorthand.

send by express delivery ( pt , pp sent )

very fast

rapid ⇒ 中国经济正高速发展。 Zhōngguó jīngjì zhèng gāosù fāzhǎn. → China's economy is developing rapidly.

uninvited guest ⇒ 她是晚会上的不速之客。 Tā shì wǎnhuì shang de bù sù zhī kè. → She was an uninvited guest at the party. ⇒ 昨晚我家来了一位不速之客。 Zuówǎn wǒ jiā láile yī wèi bù sù zhī kè. → Yesterday evening we had an unexpected guest.

motorway ( 英 ) freeway ( 美 )

try to run before one can walk ⇒ 学习外语是一个循序渐进的过程，欲速则不达。 Xuéxí wàiyǔ shì yī gè xún xù jiàn jìn de guòchéng, yù sù zé bù dá. → Studying foreign languages is a progressive, gradual process – you can't run before you can walk.