Tempering sand
[机] 调质砂
🧩 词语组成解析
[医] 回火, 淬硬
sand
[sænd]
n. 沙;沙滩;沙色;
vt. 撒沙于;用砂纸磨光;
🗣️ 情景例句
Never say die.
永不气馁！
I will take an elevator.
我将去搭电梯。
Number 13 buses run much more frequently, don't they?
13路车跑得更勤，是不是？