from time to time
不时，有时
同义词
参考例子
1.From time to time, we need an expert.
有的时候，我们需要一个专家。
2.You can see statistics about memory usage as it changes from time to time.
有时候，你可以查看关于内存使用统计表作为它的变更。
3.From time to time, according to his theory, passing ships and planes set off the crystal, which confuses their instruments and sucks them into the ocean.
按照他的理论，过往的船只或飞机时不时会触动那块水晶，于是它会干扰它们的仪器，把它们吸入海底。
英文解释
adv.
1.now and then or here and there
网络释义
from time to time
有时,不时; 有时; 时常，有时，不时; 不时;
from time to time
不时，有时;
From time to time to
时时地;
Work from time to time
一直工作; 不时地投入工作;
In these lines from time to time
这些线路不时; 经过那么长时间在一起;