As they drove along, the beautiful scenery now and again attracted his attention.

他们驱车前行的过程中 美丽的风景时而吸引他的注意力

I give it a polish now and again.

我不时把它擦亮。

I love listening to my friends talk and laugh, throwing in a zinger of my own now and again.

我喜欢听我好友说说笑笑，不时地插入几句我自己的巧言妙语。

Now and again, he disappeared only to reappear once more.

他时而消失，时而又出现。

A few bats skimmed his nose now and again and scared him half to death.

几只蝙蝠不时掠过他的鼻子，把他吓得半死。