Underhardening
欠热淬火, 低温回火处理 (用于高速钢刀具)
🗣️ 情景例句
Don't lose sleep over it.
别因为这事儿睡不着觉。
Gee, that's bitter.
噢，好苦！
Good evening! Mr Green, where are you from?
晚上好，格林先生，你是哪里来的？