Backweld
背焊缝
🗣️ 情景例句
I'm busy packing for the journey.
我为外出旅行，正忙着打点行李。
Just to be on the safe side.
为安全起见。
you are conditioned by the conventions of the community to such a degree that it is very difficult to conceive of anything really destructive.
社团的风俗习惯会严格地制约你，使你很难有破坏性的想法。