You take part in meetings where your presence really isn't necessary.
你参加了本不必要你出席的会议。
Electrical apparatus for use in the presence of combustible dust - Part 0: General requirements.
有可燃性粉尘场合用电气设备。第0部分：一般要求。
Electrical apparatus for use in the presence of combustible dust - Part 0: General requirements.
有可燃性粉尘场合用电气设备。第0部分：一般要求。
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