If my GPA isn't high enough I can't play any sports.
如果我的平均学分不够高,我就不能再参加体育活动了。
These clothes are too short, they need to be let down.
这些衣服太短了需要去改一下。
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.