The emergence of the helicopter has brought about the great advances in infantry mobility.
The emergence of the helicopter has brought about the great advances in infantry mobility.
Infant“婴儿”和infantry“步兵”来源于同一个拉丁语单词，字面意思是“不会说话的人”
Infant“婴儿”和infantry“步兵”来源于同一个拉丁语单词，字面意思是“不会说话的人”
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