两个防守前卫之一，位置在争球线一段短距离之后，相对来讲靠近边界线。
Either of two defensive halfbacks stationed a short distance behind the linebackers and relatively near the sidelines.
目的了解广州地铁二号线开通前卫生状况并与一号线开通前进行比较。
Objective To analyze the sanitation status of Guangzhou metro 2nd line before operation, and compare it with Guangzhou metro 1st line.
灵鹤礼品拥有在世界范围内的多位国际专业买手的一线信息渠道，灵敏的捕捉国际最前卫的礼品潮流趋势；
Crane gift has a soul in the world of many international professional buyers, first-line information channels, sensitive to capture the international trend of cutting-edge gifts;
灵鹤礼品拥有在世界范围内的多位国际专业买手的一线信息渠道，灵敏的捕捉国际最前卫的礼品潮流趋势；
Crane gift has a soul in the world of many international professional buyers, first-line information channels, sensitive to capture the international trend of cutting-edge gifts;
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