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A long train sometimes needs two engines.是什么意思？

A long train sometimes needs two engines.

长的列车有时需要两个机车。

相关词汇
long train sometimes needs two engines

long

adj. 长的，长时间的，冗长的，过长的，长音的；adv. 长久地，始终，遥远地；n. 长时间，长时期，[语]长音节，（服装的）长尺寸，长裤；vi. 渴望，极想；
例句
As long as most people are happy to have the monarchy, the abolitionist position is an arrogant fantasy.
只要大多数人还乐意保留君主制，废除它的主张就是痴人说梦。

train

n. 火车，行列，一系列相关的事情， 拖裾；v. 训练，教育，培养，修整；
例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

sometimes

adv. 有时，间或，时
例句
I want to work at home on a Tuesday but as it turns out sometimes it's a Wednesday or a Thursday.
我想周二在家工作，但实际上有时却是周三或是周四。

needs

adv. （现与must前后连用）必须，一定，务必；v. 需要，必须( need的第三人称单数 )，（表示应该或不得不做）有必要；
例句
A sick person needs absolute confidence and trust in a doctor.
病人需要对医生有绝对的信心和信任。

two

n. 两个，两个东西，两点钟，一对；adj. 两个的，我
例句
He has been absent from his desk for two weeks...
他已经有两个星期没有坐在办公桌前了。

engines

n. 发动机( engine的名词复数 )，引擎，火车头，火车机车；
例句
...a bomber with twin engines and heavy defensive armament.
配有双引擎和重型防御装备的轰炸机
热门例句
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。
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。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
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。
Supporters of the death penalty argue that it would deter criminals from carrying guns...
死刑的支持者认为它能阻吓罪犯携带枪支。
相关例句
a pip on a dice, officer’s uniform, etc
骰子上的点、军官军服上的星等
The candle-light flickered in the wind.
烛光在风中摇曳。
His house is close to mine.
他的房子靠近我家。
They are not acclimatised to the tropics.
他们还不适应热带气候。
He cast off fear and decided to make a try.
他去掉害怕心理, 决定试一试。
I've had more than my fair share of troubles in my time.
我在任期内遇到了不少麻烦。
The musicians played with gusto.
音乐家兴致勃勃地演奏。
He took us over to the window.
他带我们到窗户旁。
People flocked to hear the new prophet.
人们成群结队地去听这新的预言家演讲。
He was full on that point.
他对那一点讲得很详尽。