No one discovers a rarity by chance.

无都不会下子就发现件珍品。

Nothing happens by chance or by means of good luck.

没有事情偶然出现或运气使然。

A) ;;made it more effective by chance.

A）；；偶然使它更有效。

It was just by chance really.

那真偶然。

It just doesn't happen to them by chance.

这并不偶然发生在们身上。

Many of the first medicines were discovered by chance.

许多最早药物都偶然发现。

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

你好，米格尔。我妈在家吗？

We use this expression to say something happened by chance.

我们用这句话来表达偶然发生事情。

But Feynman did not earn his academic prowess by chance.

但费曼学术成就并非偶然。

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

我首府——日内瓦人口第二多城市。

Why are the chickens crying? By chance

这些鸡为什么乱叫？偶然吗？

The cop had been there by chance; he never hit his lights.

警察那会偶然在那，从不闯红灯。

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

德国人不偶然闯进们家。

The booster lowered the chances of death by between 75 and 79 percent.

加强针可降低75%-79%死亡几率。

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

她认识了当时还实习生吴，纯属偶然。

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

无意中邂逅就偶然遇见某个人。们怎样，待人友善吗？

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

你在这里时候，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.

就算真来了，我们也能把赶回去。

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

后来个偶然机会，卡洛斯遇到了奥斯汀，并且看到了奥斯汀安装在鲨鱼身上摄像机拍摄画面。

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

无意中吐露些话逐渐使我搞清了来历。