Not all such mishaps happened by accident.

并非所有这些事故都是意外发生的。

What happened by the end of the year?

学年结束时，情况如何？

It was happened upon by accident.

它是在偶然情况下被发现的。

If it hasn't happened by now, it will take a miracle.

如果我还是不能红的话，只能等待奇迹了。

We use this expression to say something happened by chance.

我们用这句话来表达偶然发生的事情。

And that doesn't happen by cramming.

但是死记硬背并不能实现这一过程。

Nothing happens by chance or by means of good luck.

没有事情是偶然出现或运气使然。

The clustering of orbits like this is extremely unlikely to have happened just by chance.

像这样聚集在一起的轨道极不可能是偶然发生的。

The closest the Dutch ever came to a permanent settlement on Australia happened entirely by accident.

荷兰人最接近在澳大利亚建立永久定居点的一次完全是意外。

Model organisms tend to happen by accident.

模型生物往往是偶然产生的。

Sometimes bad things happen by accident.

有时，坏事是意外发生的。

What happens by effectively moving the border there?

移动爱尔兰边界会发生什么？

The first time anybody flew around the world happened back in 1924 by the US Army Air Service.

首次飞行环游世界发生在1924年，由美国陆军航空部队完成。

It does not happen by just looking at art.

也不会通过欣赏艺术而发生。

It just doesn't happen to them by chance.

这并不是偶然发生在他们身上的。

As you can see, this entire process happens by machine.

你可以看到，这整个流程都是机器操作的。

Nobody knows what will happen by the time it reaches Tokyo.

没人知道到东京的时候会发生什么。

That'll happen pretty much by 1092 or 93 years from now.

这大概会在1092或1093年后发生。

Astronomers have predicted the nova is likely to happen by September 2024.

天文学家预测，这次的新星爆炸很可能会发生在2024年9月之前。

But it doesn't look like it's going to happen by Friday.

但是看起来英国脱欧无法在周五完成。