vary from.to.例句：
1.These fish vary in weight from 3 lb to 5 lb.
这些鱼的重量从3磅到5磅不等.
2.My marks in last term varied from 80 to 100.
我上学期的成绩变化范围是80到100分.
try to do sth
I try to catch up with him.
我企图赶上他.
be crazy about
I'm crazy about computer games.
我为电脑游戏而疯狂.
get through
The passage is too narrow for cars to get through.
通道太窄,汽车过不去.