often 的同义句是什么?用两个单词代替的!

问题描述:

often 的同义句是什么?用两个单词代替的!
用一个 两词的短语来代替```

once in a while; from time to time; on rare occasions; at times; on occasion; sometimes; sporadically; periodically; occasionally now and again; once in a while; on occasion; in some cases; every so o...