bivalves什么意思解释

The fauna in the Joli Fou consists of bivalves and arenaceous forams.乔里富组内的化石主要是双壳类和砂壳有孔虫.Among 52 species of mollusca identified , 45 were gastropods, 7 were bivalves.调查期间采到的软体动物已鉴定52种,其中腹足类45种, 双壳类7种....

bivalves的音标：bivalves的英式发音音标为：['baɪvælvz]bivalves的美式发音音标为：['baɪvælvz]...