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
What for?
为什么？
I'm afraid I won't be able to come.
我恐怕不能来。
When he returns home at night, he always finds that someone has parked a car outside his gate.
当他夜里回到家时，总是发现有人把车停在他家大门外。