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Day and night alternate.是什么意思？

Day and night alternate.

昼夜更替。

相关词汇
day and night alternate

day

n. 一天，白天，时期，节日；adj. 日间的，逐日的；adv. 每天，经常在白天地；

and

conj. 和，与，而且，于是，然后，因此；

night

n. 夜，晚上，（举行盛事的）夜晚；

alternate

adj. 轮流的，交替的，间隔的，代替的；vi. 交替，轮流；vt. 使交替，使轮流；n. 〈美〉（委员）代理人，候补者，替换物；
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He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
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For the rest of the morning he searched aimlessly through the town.
上午余下的时间里 ，他在镇上漫无目标地四处搜寻。
I aimed the gun carefully at the target.
我小心地用枪瞄准了目标。
alkali chloride
碱金属氯化物
She has elected to become an agronomist.
她决心做一个农学家。
Our knowledge about agriculture has so far been exclusively confined to books.
我们对农业学的知识至今只限于书本上所说的。
They aided the poor.
他们帮助穷人。
You aim too low.
你志向太低。
The government ordered an airlift of medical and food supplies to the disaster area because the roads were destroyed.
由于公路被毁，政府命令向受灾地区空运药品和食品。
An alcoholic is not allowed to drive.
酗酒者不许开车。
He is still alive.
他仍然活着。
alienated from the society
与社会疏远的
He has an alert mind.
他很机灵。
The best airships were the giant Graf Zeppelin and the luxurious Hindenburg of the 1930s.
最好的飞船是20世纪30年代特大的齐柏林号和豪华的兴登堡号。
He and I clean our room on alternate days.
我和他隔日轮流打扫我们的房间。