on average 平均
On average, each of the two million big stones weighed about as much as a large pickup truck.
平均而言,这200万块巨石,每一块的重量相当于一辆大皮卡。
2. Governments cannot eliminate risk, but they can help ensure that if calamity strikes, people bounce back.
bounce back 重整旗鼓
He is young enough to bounce back from this disappointment.
他还年轻,会很快从失望沮丧中恢复过来的。