... sand沙子 serve v服务 professor教授 ...
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serve v
为v
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The tiltrotor technology proven by the V-22 will serve this country, and its men and women in uniform, with distinction for generations to come.
CENTERFORSECURITYPOLICY: Pentagon V-22 decision equals true transformation
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