close in upon

基本解释

Its four bare walls seemed to close in upon you like the sides of a coffin.
它的四面腾空的墙壁如同棺材四周的板子一样把你围起来。
That'll do. We begin to close in upon 'em about dusk. A little before dusk, my orders are. That'll do. '
行，到黄昏的时候我们开始挺进，上面的命令也是要我在天黑之前开始追捕，肯定来得及。
That discretional close in upon nonlinear system is the theoretic gist of fuzzy logic system to identify process of complicated industry and educe reasonable control.
对非线性系统的任意逼近性是模糊逻辑系统能够用来辨识复杂工业过程、给出合理控制的理论依据。

This worldwide network of facilitators is, from now on, conducting capacity-building activities for the implementation of the Intangible Heritage Convention in their respective regions, upon the requests of States Parties and in close collaboration with UNESCO.
UNESCO: Intangible Cultural Heritage
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FORBES: Close Election Hysteria: Let's Not Pick Our President In The Courts
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ECONOMIST: Kenya