Sandmark
砂印(轧制时落入耐火材料等物形成的钢板表面缺陷), 夹砂
🗣️ 情景例句
She is giving me piano lessons in exchange for her English classes.
我教她英语，她教我弹钢琴。
Here's no necessary.
我看没这必要。
Before long, biscuits of all shapes and sizes began arriving at the factory.
不久，形状各异，大小不一的饼干陆续送到工厂。