If this happens, it can become very difficult to cough up phlegm.
如果发生这种情况，它可以成为很困难的痰咳起来。
Simple actions, such as eating and drinking, become very difficult to perform.
简单的活动，如吃饭喝水，变得十分难以进行。
Butnow, they unexpectedly find that renting house has also become very difficult.
令他们意想不到的是，现在租房子也变成了难事。
But unemployment has become a trap, one that's very difficult to escape.
但是失业率已经变成了一个陷阱，一个难以逃脱的陷阱。
In short, things may well soon become very confusing and difficult.
简而言之，事情很可能很快就会变得非常迷惑，而困难的。
The templates will be too complex and will become difficult to update very quickly.
那样的模板将会过于复杂，而且将变得难以非常迅速地更新。
In childhood, I thought you were very mystical, let all difficult problems become the pleasure.
小时候，我以为你很神秘，让所有的难题成了乐趣。
I want to become a director, although I know this is very difficult.
我想成为一个导演，虽然我知道这很困难。
These states are difficult to decay and become very stable.
这些态很难向下衰变，因而很稳定。
Surfing is a very difficult sport to become good at.
冲浪是一项高难度的运动。
Surfing is a very difficult sport to become good at.
冲浪是一项高难度的运动。
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