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事非经过不知难用英语怎么说？

事非经过不知难

You never know till you have tried.

相关词汇
you never know till have tried

you

pron. 你，你们，您们，各位，大家；
例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

never

adv. 从不，从来没有，一点也不，决不，<口>不会…吧，没有，不曾；
例句
The public never had faith in his ability to handle the job...
公众从来不相信他有能力胜任这一职位。

know

v. 知道，了解，认识，确信；n. 知情；
例句
I know you're above me socially, but I must say I find your attitude offensive...
我明白你的社会地位比我高，但我得说我觉得你的态度很粗鲁。

till

vt. 耕种，耕作；n. 钱柜，钱箱，放钱的抽屉，[地]冰碛土（物）；prep. 直到；
例句
We could bang on the desks and shout till they let us out...
我们可以拍着桌子大喊大叫，直到他们放我们出去。

have

aux. 用以构成完成式及完成式的不定式，表示已经…；vt. 有，具有，拿，取得，从事，必须，不得不；n. 〈口〉有产者，有钱人，富国，〈英俚〉欺骗，诈骗；
例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

tried

adj. 可靠地，经过考验的；v. 试图，努力( try的过去式和过去分词)，考验，磨炼，审讯；
例句
He was tried in absentia and sentenced to seven years in prison.
他被缺席判处七年监禁。
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
Do not , for one repulse , give up the purpose that you resolved to effect .(William Shakespeare , British dramatist)
不要只因一次失败，就放弃你原来决心想达到的目的。(英国剧作家 莎士比亚.W.)
Do not be led by reports, or tradition, or hearsay.
不要被任何报导、传统、或流言所左右。
A close mouth catches no flies .
病从口入
A man is called selfish, not pursuing his own good, but neglecting his neighbour's.
追求自身的利益，不是自私；只有忽视他人的利益，才是自私。
Strike while the iron is hot.
趁热打铁
Every man is his own worst enemy
一个人最大的敌人就是他自己。
A great ship asks for deep waters.
大船要走深水。
Every horse thinks its own pack heaviest.
每匹马都认为自己所负的背包最重。
The man with a new idea is a crank until the idea succeeds.(Mark Twain , American writer)
具有新想法的人在其想法实现之前是个怪人。 (美国作家 马克·吐温)
To sensible men, every day is a day of reckoning. -J.W.Gardner
对聪明人来说，每一天的时间都是要精打细算的。