Sand seal
[化] 沙封
🧩 词语组成解析
sand
[sænd]
n. 沙;沙滩;沙色;
vt. 撒沙于;用砂纸磨光;
seal
[sil]
n. 密封;印章;海豹;封条;
v. 密封;盖章;决定;封上（信封）;
🗣️ 情景例句
Do you have any plans after class today?
今天下课后你有什么安排吗？
I did lesson yesterday.
我昨天做功课。
They cut big pieces of metal into small pieces.
它们把大块的金属切成小块。