Some people are afraid of flying, which limits their options when traveling.
一些人十分害怕坐飞机,这也就限制了他们旅行时的选择了。
He learns English every day.
他每天都学英语。
But even in the most favourable circumstances only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them.