Once I've done that, it's a piece of cake.

Sure It's a piece of cake. I'll show you how after lunch.

当然.小菜一碟. 午饭后我给你示范一下.

I am working on it. Someday, it '; ll be a piece of cake.

我正在致力于它, 有一天它会是小菜一碟.

If they went around complaining publicly, they might not find it so easy to get another job.

如果他们总是当众发牢骚，再找别的工作可就没那么容易了。

BBC is an abbreviation for British Broadcasting Corporation.

BBC是英国广播公司的缩写.

The British Broadcasting Corporation is very famous across the world.

英国广播公司在世界上很出名。

Mr Jones: Ah. The British Broadcasting Corporation.

琼斯先生: 噢. 是在英国广播公司.

Angela: The British Broadcasting Corporation?

安琪拉: 英国广播公司?

British Broadcasting Corporation began the long-term continuous broadcast television programs.

英国广播公司开始 长期 连续播发电视节目.

A stream of cold air flowed into the warm room.

一股寒气流进了温暖的房间.

But cold air does not always cause a cold.

但是冷空气不一定引起感冒.

Birds'songs pierce the cold air.

天寒人鸟音.

They went outside for a breath of cold air.

他们走出去呼吸一口清新的空气.

The cold air poured into the room.

冷风往房里直灌.

Warm air can contain more water vapor than cold air.

热空气要较冷空气容纳更多的水蒸汽.

The dough shrank slowly in the cold air.

面团在冷空气中慢慢收缩了.

Can you give me some track to it?

你可以给我提供一些有关那件事的线索 吗 ?

Flowers perish when frost comes.

霜降时花即枯萎.

Frost fell on the field.

霜降旷野.

Last week we visited Lu Xun's Memorial Hall.

上星期我们参观了鲁迅纪念馆.

The book was written by Lu Xun.

这本书是鲁迅写的.