heard from time to time

The time allotted for this test is 90 minutes, and many of the participants I've heard from have indicated that this time is just sufficient to get through the exam.

这项考试规定的考试时间是 90 分钟，我收到许多考生的来信，他们表示：这个时间正好够完成考试。

I heard on the radio the other day that the origin of the phrase "drunk as a Lord" came from a time when the aristocracy were the ones with the time and money to get boozy.

又有一天，我在广播里听到，“drunk as a lord”(酩酊大醉)这一短语源于一个特定时期——在那时，贵族总是把时间和金钱花费在买醉上面。

Xiao li recently heard the old man was tricked into rumors from time to time, he thought of his mother, because mother is the most easy to trust others.

小李最近时不时听见老人被骗的传闻，他想到了自己的母亲，因为母亲最容易轻信别人。