| 单词 | alternation |
| 释义 | alternation /awl'teuhr nay"sheuhn, al'-/, n. 1. the act or process of alternating or the state of being alternated. 2. alternate succession; repeated rotation: the alternation of the seasons. 3. Elect. a single fluctuation in the absolute value of an alternating current or voltage from zero to a maximum and back to zero, being equal to one half cycle. 4. Ling. variation in the form of a linguistic unit as it occurs in different environments or under different conditions, as between the -ed and -en forms of the past participle in danced and spoken or between the /t/ and /d/ pronunciations of the past tense suffix -ed in hopped and rubbed. [1605-15; < LL alternation- (s. of alternatio). See ALTERNATE, -ION] |
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