No one discovers a rarity by chance.

无论是谁都不会下子就件珍品。

Nothing happens by chance or by means of good luck.

没有事情是偶然出或运气使然。

A) ;;made it more effective by chance.

A）；；偶然使它更有效。

It was just by chance really.

那真的是偶然。

It just doesn't happen to them by chance.

这并不是偶然生在他们身上的。

Many of the first medicines were discovered by chance.

许多最早的药物都是偶然的。

Hey, Miguel. Is, uh, my mom around by chance?

你好，米格尔。我妈在家吗？

By chance, would you talk to her for me?

有没有可能你帮我跟她美言两句？

We use this expression to say something happened by chance.

我们用这句话来表达偶然生的事情。

But Feynman did not earn his academic prowess by chance.

但费曼的学术成就并非偶然。

My capital — Geneva's the second most populous city by chance.

我的首府——日内瓦是人口第二多的城市。

Why are the chickens crying? By chance

这些鸡为什么乱叫？是偶然的吗？

Now, the Germans just didn't come to that house by chance.

德国人不是偶然闯进他们家的。

She met Wu, who was an intern at the time, purely by chance.

她认识了当时还是实习生的吴，纯属偶然。

I see. Bump into means to meet somebody by chance. So were they friendly?

无意中邂逅就是偶然遇见某个人。他们怎样，待人友善吗？

It was never in my mind to breeding camel; it just came by chance.

我从未想过养骆驼，这只是个巧合。

You didn't, by chance, buy anything at Shopping World while you were here?

你在这里的时候，碰巧没有在购物世界买东西吧？

And if by chance he does, we'll throw him back into the sea.

就算他真来了，我们也能把他赶回去。

Then, by chance, Carlos met Austin — and saw footage from Austin's shark-mounted cameras.

后来个偶然的机会，卡洛斯遇到了奥斯汀，并且看到了奥斯汀安装在鲨鱼身上的摄像机拍摄的画面。

It was from words dropped by chance that, little by little, everything was revealed to me.

他无意中吐露的些话逐渐使我搞清了他的来历。