Lithopedion
[医] 胎儿石化, 石胎
🗣️ 情景例句
Why is that necessary?
为什么有此必要
To be virtuous is to do good.
行善是美德。
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。