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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
Some thing is learned every time a book is opened.
开卷有益
Accept what was and what is, and you’ll have more positive energy to pursue what will be.
接受过去和现在的模样，才会有能量去追寻自己的未来。
Great works are performed not by strength but by perseverance
没有恒心只有力量是完不成伟业。
Relax! be patient and enjoy yourself. learning foreign languages should be fun.
放松点！要有耐性，并让自己快乐！学习外语应该是乐趣无穷的。
The heart is seen in wine.
酒后吐真言
A man can succeed at almost anything for which he has unlimited enthusiasm.
无论何事，只要对它有无限的热情你就能取得成功。 ——C.
You cannot improve your past, but you can improve your future. Once time is wasted, life is wasted.
你不能改变你的过去，但你可以让你的未来变得更美好。一旦时间浪费了，生命就浪费了。
There is no garden without its weeds.
没有不长杂草的花园。
Don't believe that winning is really everything. It's more important to stand for something. If you don't stand for something, what do you win
不要认为取胜就是一切，更重要的是要有信念。倘若你没有信念，那胜利又有什么意义呢？
Seeing is believing.
百闻不如一见。