adj.频繁的;
v.常去;
例句:
The loss of relatives is among the most frequent trials in life.
失去亲人是人生最常遇到的痛事之一.
It is not polite to interrupt a speaker with frequent questions.
不断提问打断演讲者是不礼貌的.
He had frequent attacks of malaria.
他常患疟疾.