需要: 1.(应该有或必须有) need; want; require; demand; do with 短语和例子需要立即采取行动 require immediate action; 她需要休息。 she is in need of a rest. 我们需要一个和平的国际环境。 we want [need] a peaceful international environment
知道: know; realize; be aware of 短语和例子不可能知道 there is no knowing; 她知道你的意思。 she knows what you mean. 我怎么会知道呢? how can i know
