Polycross
多系天然杂交, 多向杂交, 多父本杂交
🗣️ 情景例句
Oh, yes. Are his models here?
噢 ，对啦。 他的模型在这里吗？
Friends are lost by calling often and calling seldom.
交往过密过疏，都会失去朋友。
After this he immediately lets himself in and begins barking again.
出去之后，它又马上把自己放进来，接着再开始叫。