Ectypum
用凹模铸成的模型
🗣️ 情景例句
I have worked hard at my major subject.
我对主修课特别用功。
To knit a scarf for her sweetheart
替她的情人织围巾
But we do not need to send men down to get the oil out, as we must with other mineral deposits.
但是，我们不必像开采其他矿藏那样，把人送到地下去把石油取出。