You simply make sure the meeting starts on time, and that the door is then firmly closed - or, better still, locked. Latecomers will have to knock and be admitted in disgrace.

你只需确保会议按时开始，然后把会议室的门紧闭——或者更棒的是，把门锁上——迟到的人必须先敲门，然后得到允许，再一脸羞愧地走进来。

youdao

During the second orbit, one of these signals warned that the heat shield might not be locked firmly to the bottom of the spacecraft.

VOA: special.2009.06.17