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He replaced a dud valve.是什么意思？

He replaced a dud valve.

他换掉了坏阀门。

相关词汇
he replaced dud valve

he

pron. 他，它，一个人；n. 雄性动物；
例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

replaced

v. 取代( replace的过去式和过去分词 )，更换，把…放回原位，（用…）替换；
例句
The mist had been replaced by a kind of haze that seemed to amplify the heat...
薄雾散了，取而代之的是一种似乎更添酷热的烟霭。

dud

n. [军]哑弹，无用的人或物，衣服，个人物品；adj. 无用的，不完善的；
例句
He replaced a dud valve.
他换掉了坏阀门。

valve

n. 阀，真空管，（管乐器的）活栓，（心脏的）瓣膜；vt. 装阀于，以活门调节；
例句
One of the long-lasting effects of the infection is damage to a valve in the heart...
感染的其中一个长期后果是使心脏瓣膜受损。
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。
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。
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。
相关例句
Rough seas today prevented specially equipped ships from skimming oil off the water's surface...
今天海面上风浪很大，那些配有专门设备的船只无法展开清除海面浮油的工作。
...a wide passage, lit from one side by recessed windows.
一边有凹窗、光线可以照进来的宽敞走道
...if you're saving up for a new outfit you've had your eye on.
如果你在攒钱买一套你看中的新衣服
As you walk faster, you will find the arms bend naturally and more quickly.
走快时，你会发现手臂会自然弯曲，而且频率会更快。
In Los Angeles a pedestrian is a rare spectacle...
在洛杉矶很少见到步行者。
He blamed lack of parental control for the young tearaways' behaviour.
他认为，那些小流氓行为不端是因为缺少家教。
When travelling on fast roads at night it is impossible to drive and navigate at the same time.
晚上在高速路上行驶时根本做不到边开车边找路。
The committee's recommendations are unlikely to be made public...
委员会的建议不大可能公开。
A child's head tends to take the brunt of any fall.
孩子摔倒时，头部最容易受伤。
My father was in ecstasy when I won my scholarship...
我获得奖学金时父亲欣喜若狂。