They live in a backward part of the country.

人们依旧认为这是一个落后的国家。

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Recoil mechanism is the crucial part which controls the backward movement of a gun.

驻退机是反后坐装置中控制火炮后坐规律的关键部件。

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Recoil mechanism is the crucial part which controls the backward movement of a gun.

驻退机是反后坐装置中控制火炮后坐规律的关键部件。

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