Quitting smoking is hard work and your efforts should be rewarded.
戒烟的确很难，因此付出的努力应该值得鼓励。
I tryed very hard to persuade him to quit smoking, but to no purpose.
我说服他戒烟，但却白费力气。
He tried very hard to refrain himself from smoking.
他费了很大的劲儿才克制住自己不抽烟。
Most people find it hard to stop smoking.
大多数人发现戒烟很难。
Why is it so hard to quit smoking?
为什么戒烟如此困难?。
Our factory has a hard and fast rule against smoking.
我们工厂严格规定不许吸烟。
Our factory has a hard and fast rule against smoking.
我们工厂严格规定不许吸烟。
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