They're what's responsible for the smell of freshly cut grass.

也就是刚割完草时那股味道的由。

That's where the railway comes in.

这就是这条铁路的由。

It is tradition that dates back hundreds of years.

这一民俗的由可以追溯到几百年前。

She tried to tell me about it but I knew it was something funny.'

她想法子向说明它的由，但是知道这件事蹊跷。”

A great chasm eroded over 250 million years by the Colorado river.

这条巨大的峡谷，在2亿5千万年由科罗拉多河侵蚀而成。

What causes our nose to randomly bleed?

是什么导致你的鼻子不分由地就流血了呢？

The way to overcome a mental affliction is to cease to look at it merely as an explanation-less nuisance.

克服精神痛苦的方法是不再把它仅仅视为一种没有由的麻烦。

And you're thinking, " Mm, are you gonna finish this or shall I finish this? "

你在想，“嗯，由你结束聊天还是由？”

So that's where the challenge comes in.

这就是挑战的由。

Now let us look at the two-word form of " every day."

现在看看由两个单词构成的every day。

The history of the Chinese Lantern Festival.

中国元宵节的由。

So this is the source of the word, Pygmalion.

这是这个词的由。

And that is where our expression comes in.

这就是表达的由。

Which is exactly where the doors come in.

这正是飞机舱门的由。

That's how the Educove platform came to be.

这就是Educove平台的由。

That's where the Soviet Union comes from.

苏维埃就是苏联的由。

And that was the reason for leafing day.

这就是叶子节的由。

In time, it will become known as Thanksgiving.

那就是感恩节的由。

Now let's look at early initiation of CPR by lay rescuers.

现在看看由外行救援人员进行的早期心肺复苏术。

This is the first government-backed delegation from Australia to China in three years.

这是三年首次由澳大利亚政府支持的代表团访问中国。