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Beijing can be quite a tiring city to live in with atmospheric and noise pollution but the quality of life is improving .

北京可以说是一个相当累人的居住城市因为大气和噪音污染但这里的生活质量正在提高。

If your friends and colleagues send you a lot of photos and documents its very difficult and tiring effort to download them one by one .

如果你的朋友和同事给你发送了很多照片和文件，要把它们一个个的下载下来是非常困难和累人的。

Everybody knew that in the animal world the winter was a time for rest and sleep . Nobody wanted to do anything important or tiring .

每个人都知道，在动物世界里冬季是休息和睡眠的季节，没有谁想干任何重要或吃力的事情。