意思翻译
困难同义词
相关相似difficult season───困难季节
difficult opponent───难对付的对手
difficult birth───难产
difficult issue───难题
difficult match───困难的比赛
difficult period───困难时期
difficult position───困境
difficult process───艰难的过程
difficult question───难题
双语场合用语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.───由于化石的保存状况以及标本的修理难度等多种原因，已经发表的材料中包括了大量的同物异名现象以及无效的属种。
英语场合用语延伸推荐- difficulty urination women