Periods of deep depression alternate with very excited behaviour.

To alternate with another person in performing a task.

交替:与他人交替做同一份工作.

Due to the heavy workload, they decide to alternate with the work.

alternate:因为工作量很大, 他们决定轮流做.

Day and night alternate with each other.

日夜彼此交替.

Wet days alternate with fine days.

雨天和晴天相间而来.

My mom and dad alternated in feeding the baby.

我爸妈轮流喂婴儿.

Since 1895, the media has alternated between global cooling and warming scares.

自从1895年以后, 媒体在全球变冷和变暖的恐惧之间来回交替.

My younger sister and I alternated in doing the dishes.

我妹妹和我轮流洗盘碟.

He alternated kindness with cruelty , ie was kind , then cruel, then kind again, etc.

他恩威并行(时而和蔼可亲, 时而凶狠残暴).

We kept the cattle off the north and east and alternated in taking charge of them.

我们让牛群呆在北面和东面,轮换着去看牛.

During the next nine years he alternated between service in several armies and carousing in Paris.

在那以后的九年里,他时而在几个军队中服役,时而在巴黎狂欢作乐.

The ailing man alternated two hours of work with one hour of rest.

这个病人每工作两小时休息一小时.

He alternated between high spirits and low spirits.

他一会高兴一会沮丧.

The sentries alternated their watch.

哨兵轮流站岗.

My life alternated between work and sleep.

我的生活就是工作完了睡觉,睡完觉又工作.

The weather alternated between rain and sunshine.

时而下雨,时而放晴.

The valetudinarian alternated two hours of work with one hour of rest.

那个体弱多病的人每工作两小时就要歇一小时。

The young man alternated singing and dancing.

那年轻人一会儿唱,一会儿跳.

The songs are alternately bright and funand dark and pensive.

歌曲在明暗,哀乐种交替变换着.

Owen was alternately dejected and maddened by the knowledge of his own helplessness.

欧文因自己一筹莫展,时而烦闷,时而生气.

As a companion star orbits its primary , it alternately approaches and recedes from the Earth.

当伴星围绕着主星运转时, 它交替地朝着地球或背离地球运转.