/ˈɔːltəneɪt/
no obj.
1- occur in turn repeatedly交替：
bouts of depression alternate with periods of elation
经济繁荣期和萧条期的交替出现
as adj. alternating a season of alternating hot days and cool nights.白天热晚上凉的季节。
1.1
- with obj. do or perform in turn repeatedly交替做, 轮流做：
some adults who wish to alternate work with education.
一些希望工作和学习交替进行的成年人。
1.2
- (of a thing) change repeatedly between two contrasting conditions（事物）轮流, 更替：
the government alternated between the Labour and Conservative parties.
政府在工党和保守党之间轮流更替。
/ɔːlˈtɜːnət/
attrib.
1
- every other; every second间隔的; 每隔一个的：
she was asked to attend on alternate days.
她被要求隔天出席。
1.1
- (of two things) each following and succeeded by the other in a regular pattern（两者）交替的, 轮流的：
alternate bouts of intense labour and of idleness.
一会儿高强度劳动, 一会儿又无所事事。
1.2
- (of a sequence) consisting of alternate items（序列）交替出现的。
1.3
- Botany (of leaves or shoots) placed alternately on the two sides of the stem【植】（叶, 芽）互生的。
2
- chiefly N. Amer. another term for ALTERNATIVE.〈主北美〉 同ALTERNATIVE:
a novel set in an alternate universe.
一部以另一空间为背景的小说。
派生词
alternately
adverbalternation
noun词源
early 16th cent.: from Latin alternat- 'done by turns'， from alternare, from alternus 'every other'， from alter 'other'.