"provided them with all things needful"
"in most schools physical education is compulsory"
"attendance is mandatory"
"required reading"
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 and even required blood transfusions.她患有贫血症，甚至需要输血。
It was exacting work and required all his patience.工作很艰巨，需要他有极大的耐心。
Just how much kneading is required depends on the sort of flour.需要揉多久取决于用哪种面。
The machine automatically downloads the required information to his or her fax.机器能自动将需要的信息下载到传真机上。
Further scans are required to confirm the diagnosis of an abnormality.需要进一步扫描来确诊是否出现异常病变。
The required technology is probably still two years off.所需技术可能还要两年才能开发出来。
Demand picked up and a reprint was required last November.由于需求量上升，去年11月，再版已是势在必行。
I was required to hold out my arms and flex my pectorals.我被要求伸展手臂，收紧胸肌。
The drive required going down a quite twisty road.开车的话需要走一段非常蜿蜒曲折的下坡路。
To minimize collateral damage maximum precision in bombing was required.为了尽量减低附带性破坏，轰炸须做到最大程度的精确。
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。
The amount required to redeem the mortgage was 'u00a3358,587.需要偿还的抵押贷款总计358,587英镑。
Water each plant as often as required.按要求经常给每一株植物浇水。
