Unep
abbr. 联合国环境规划署（United Nations Environment Programme）
🗣️ 情景例句
The instructions were not easily understandable.
这份说明书不容易理解。
To protest against something
抗议
The sides of the dish were so smooth that it was almost impossible to attach hawsers and chains to the rim without damaging it.
盘子四边十分光滑，要在盘边拴上绳索或链条而同时又不损坏它是很难办到的。