例句：
He made efforts to move the heavy furniture.
他努力搬动沉重的家具。
The lead is heavy and the plastic is light.
铅是重的，而塑料是轻的.。
We have a heavy correspondence to deal with .
我们有大批信件待处理。
We had heavy hearts as we went to a funeral.
我们怀着沉重的心情参加葬礼。
There will be heavy snow in the coming few days .
近期内将下大雪。