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ob-,相对，对着的，-struct,堆积，建造，词源同structure,construct.即堆在对面的，引申词义障碍，阻碍，阻挠等。

1. Claire positioned herself so as not to obstruct David's line of sight.

克莱尔为了不挡住戴维的视线挪了一下位置。

2. A number of local people have been arrested for trying to obstruct lorries loaded with logs.

一些当地人因试图阻止满载原木的卡车通行而被逮捕。

3. The defences are intended to obstruct any advance by tanks and other vehicles.

这些防御工事用于阻止坦克等车辆前进。

4. He became still more dissatisfied with it and secretly did everything in his power to obstruct it.

他对此更不满意,尽在暗里使绊子.

5. No difficulty can ever obstruct the advance of the Chinese people.

任何困难都阻挡不住中国人民的前进.