Polycross
多系天然杂交, 多向杂交, 多父本杂交
🗣️ 情景例句
Hello.
喂。
All things are difficult before they are easy.
凡事必先难后易。
Squeezing through a cleft in the rocks, the pot-holers arrived at an enormous cavern, the size of a huge concert hall.
洞穴探险者从岩石缝里挤身过去，来到一个巨大的洞里，其大小相当于一个音乐厅。