Pipefitting
un. 管子配件；管配件；管道链接\\n
🗣️ 情景例句
When you understand the cultural background, you can better use the language.
当你了解了文化背景，你就能更好地运用语言。
I'm not really sure.
我不太清楚。
Who was second? Who was third?
谁是第二？谁是第三？