rain on的用法和樣例：
例句
- It's bound to rain on Sunday.
星期天肯定會下雨。 - I'm sorry we're late; we started in good time but heavy rain on the road held us back.
很抱歉，我們遲到了; 我們很早便出發了，可下大雨把我們耽擱了。 - It will doubtless rain on sports day.
開運動會那天多半會下雨。 - We got more than our fair share of rain on holiday.
我們這次假期里遇到的雨天太多了。
