不要熬夜了，这对你的身体不好。
安：你真应该听医生的话，把烟戒掉。这对你的身体不好。
Ann: you really ought to follow your doctor's advice and quit smoking. It's so bad for your health.
你不是昨晚刚给手机充电吗？你不应该长时间地使用手机，这对你的身体不好。
But you've just had it recharged last night. You should not use cell phone for a long time, it's bad for your health.
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