on again的用法和樣例：
例句
- Jane doesn't know if she's going to the picnic. She's off again, on again about it.
簡不知道自己是不是要去參加野餐，她一會兒這樣，一會兒那樣。 - He took off his large spectacles, gave them a wipe, and put them on again.
他把大眼鏡摘下來，揩一揩，又戴了上去。 - Has he been trying it on again? I hope you took no notice.
他是不是又在?；ㄕ?？我希望你沒搭理他。 - We were without electricity for three hours but it's on again now.
我們的電停了三小時，現在又有了。
