often是什么意思

1、often adv.時常; 常常; 往往; 大多;
2、[例句]The disease often goes/ remains undetected for many years.這種疾病經常潛伏多年而不被察覺 。
【often是什么意思】3、[其他]比較級:more often 最高級:most often 。