展开闭门内部聆讯 held a closed-door internal hearing
电动式门开闭装置 automatic electric door opener
活门开闭机构 [机] discharge gate operating mechanism
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不久之后，联合国安理会将在纽约召开闭门会议，商讨叙利亚问题。
The UN Security Council is due to hold closed-door consultations on Syria in New York shortly.
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