now and again

Now and again, he caught a whiff of a peculiar smell.

他时闻到一股怪味。

She considers it beneath her dignity to help with the housework now and again.

她认为偶尔做家务活有失身分。

Now and again the hunter can hear a long-draw dolorous whine of some unseen coyote.

猎人时能听某只小林发出哀嚎。

Drop in now and again.

有空过来玩吧。