常见例句雙語例句For the reasons of preserve situation and the difficulty of preparation, there are a lot of synonym and the nomen dubium in the published taxa.由於化石的保存狀況以及標本的脩理難度等多種原因，已經發表的材料中包括了大量的同物異名現象以及無傚的屬種。 返回 nomen dubium