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
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Cheerfulness and goodwill make labour light.
欢快与好意，劳动不觉累。
That is a lovely hat!
真是一顶可爱的帽子！