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The aim of the three front-line basic knowledge to understand, to grasp initially, but unskilled.
对三点一线的瞄准基本常识能够理解，能够初步掌握但不熟练。
youdao
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The aim of the three front-line basic knowledge to understand, to grasp initially, but unskilled.
对三点一线的瞄准基本常识能够理解，能够初步掌握但不熟练。
youdao