您要查找的是不是：
- 关(surname)
- 开关power switch
- 清关clear customs
- 网关gateway
- 过关pass a barrier
- 中关second trial
- 被关captivity
- 接近开关proximity switch
- 玄关vestibule
- 空气开关air-break switch
- 限位开关limit switch
- 结关customs clearance
- 关於regarding
- 退关shut out (S/O)
- 以结关为准on a customs clearance basis
- 关进shut in
- 邮件网关Mail Gateway
- 入关enter the GATT
- 总开关master switch
- 闯关make a breakthrough
