Unced
abbr. 联合国环境与发展会议（United Nations Conference on Environment and Development）
🗣️ 情景例句
for Max and for yourself too, Marilyn.
为Max，也为你自己， Marilyn。
Thank you for seeing me off.
谢谢你送行。
Oxygen is widely used in ship repairs for cutting and joining metal plates or pipes.
在船舶修理过程中，常常使用氧气切割和焊接金属板或金属管。