sick in bed还是 sick in the bed,in the gym还是at the gym

sick in bed释义：

生病在床上

例句：

The old man has lain sick in bed for years.

那老者病卧于床好些年了。

sick in the bed释义：

卧病在床

例句：

It's a bore to be sick, and the novelty of lying in bed all day wears off quickly.

生病是件无趣的事，整天躺在床上的新鲜感很快就没了。