n.攻击；进攻；开始
The fierce onset of the enemy broke the ranks of the army. 敌人的猛烈攻击致使全军大乱。
The onset of the enemy took us by surprise. 敌人的进攻出乎我们意外。
He went to see a doctor at the onset of a fever. 他开始发烧时便去看医生了。
The drug must be taken from the onset of the infection. 这种药必须在感染的最初期就开始服用。
n.活动房屋
