adj.必须的，（学科）必修的v.要求( require的过去式和过去分词 )，需要，想要，命令...

The demand generated by one factory required the construction of another.一家工厂产生的需求使得必须再建造一家工厂。Interest is paid monthly. Three months' notice is required for withdrawals.利息按月支付。提款须提前3个月通知银行。She suffered from anaemia ...

required的音标：required的英式发音音标为：[rɪ'kwaɪəd]required的美式发音音标为：[rɪ'kwaɪəd]...

At the required level of visual verisimilitude, computer animation is costly.要使电脑动画的视觉效果达到要求的逼真程度，花费会十分昂贵。Here the gentiles were required to assist newly married pairs in the construction of their houses.在这里,氏族成员有协助新婚夫妇建...