劍橋詞典a type of animal with no spine , a soft body with a flat base used for moving , and often a shell , for example a snail or a slug 軟體無(wú)脊椎動(dòng)物（腹部扁平，用于爬行，通常有殼，比如蝸牛或蛞蝓） 返回 gastropod