vt. 1.需要。 2.要求；请求，命令。 短语和例子 Will you require breakfast earlier than usual 〔英国〕你需要比平常早一点开早饭吗？ They require me to come. 他们要我来。 He requires medical care. 他需要治疗。 The emergency requires that it should be done. 事情紧急，非这样做不可。 All passengers are required to show their tickets. 所有乘客都必须出示车票。 It requires that .... 有…的必要。 vi. 需要；请求，要求。 if circumstances require 遇必要时。
make someone do something 同义词：command,
consider obligatory; request and expect; "We require our secretary to be on time"; "Aren''t we asking too much of these children?"; "I expect my students to arrive in time for their lessons" 同义词：ask, expect,
have need of; "This piano wants the attention of a competent tuner" 同义词：want, need,
require as useful, just, or proper; "It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient''s consent" 同义词：necessitate, ask, postulate, need, take, involve, call for, demand,
例句与用法
1.
This requires two sine-cosine resolvers . 这就需要两个正余弦分解器。
2.
Prediction is required on two levels . 在两个勘探阶段上需要进行预测。
3.
She required the cause of his melancholy . 她就问他为什么闷闷不乐。
4.
He tendered the shipping documents required . 他递交了必要的装货单据。
5.
It was frequently required before execution . 它经常在行刑前使用。
6.
To do good work requires time and pains . 把活干好需要时间和劳力。
7.
For(ii)the transient response is required . 对（ii）则需要求瞬态响应。
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