Mandatory expenditure
[经] 强制性开支
🧩 词语组成解析
🗣️ 情景例句
I feel rotten about not taking the children out.
我没有带孩子出去觉得很不痛快。
Thank you for inviting me.
谢谢你邀请我。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。