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They saw a squadron of fifteen motorcycle policemen driving in V-formation.
他们看见15名警察骑着摩托车排成V字形前行。
《柯林斯高阶英汉双解学习词典》
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The formation of granular structure in a high-strength low-alloy C-Mn steel containing V and Ti
含钒钛低合金高强度碳锰钢中粒状组织的形成
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