constrain相关知识

词语辨析
v.(动词)constrain，compel，force，oblige 这组词的共同意思是“强迫”，都常用于被动结构。其区别在于1.compel指使用权力或各种手段迫使对方去做某事或处于某种状态；force主要指用武力或强制的办法去完成某事；constrain指由于受外界压力或环境的影响，迫使某人做某事，也可指受良心、情感或饥饿等方面的内在力量驱使去做某事；oblige则往往是由于客观原因促使某人做某事。例如When he was a young man，he was forced to leave his homeland for political reasons.早在青年时代，因为政治原因他被迫离开自己的祖国。You cannot compel good work from unwilling students.你不能迫使不肯学习的学生学习好。Cold weather constrained the plantˈs growth.寒冷的天气抑制了植物的生长。I should be obliged if you wouldnˈt say so.你如果不这样说，我就感谢你了。2.compel和force的主语既可以是人，也可以是物；oblige则一般以人作主语。例如When confronted by such clear evidence，the Senator was forced to eat his words in public.面对如此明白的证据，参议员只得当众收回前言。Energy crisis compels fuel conservation能源危机使人们必须节约燃料。The police obliged him to leave.警方要他离开。3.在语气上，compel和 同根词汇 词根constrain adj.constrained拘泥的；被强迫的；不舒服的adv.constrainedly勉强地；强迫地；不自然地n.constraint[数]约束；局促，态度不自然；强制v.constrained驱使；强迫；勉强（constrain的过去分词） 同近义词 vt.驱使；强迫；束缚chain，bound，force，provoke，enforce

中文词源： constrain 限制，强迫 con-, 强调。-str, 拉长，拉紧，词源同strict,strain. constrain
constrain相关例句和用法

常见考点例句：

Overcrowding and a shortage of resources constrain bug populations .

过于拥挤和资源短缺限制了细菌的数量。

It does have a hedging strategy to constrain beijing .

美国的确有一个对冲战略来约束中国。

Banks cannot afford it now and it will further constrain credit .

银行目前负担不起这一转变，它将进一步抑制信贷。

Higher reserve requirements and loan quotas constrain their ability to lend at a time when savers are piling into deposits .

准备金要求上调和贷款配额的实行，束缚了银行在储蓄大增之际的放贷能力。

The fact that so many homeowners are sunk in negative equity will also constrain mobility .

太多的屋主陷入了负资产的事实也对流动性进行了限制。

雅思考试相关知识分享：