Psilopsid
裸蕨
🗣️ 情景例句
before getting to the tough stuff--math.
在对付难缠的东西 数学 之前。
He that lives well is learned enough.
生活好者，博学多才。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。