any of various rhizopods of the order Testacea characterized by having a shell
例句
There are lots of testacean aquatics attached to the underwater concrete surfaces of the spiral casing and draft tube in Shaxikou hydropower station. 沙溪口水电站水下蜗壳及尾水管混凝土表面附着较多的贝壳类水生物,水下混凝土侵蚀严重,影响水工建筑物的安全运行。
Next, the male should notice nutrition on food, eat food of a few rich zincic more, wait for shrimp of testacean, fish, beef, egg and bean products like oyster. 其次,男性在饮食上要注意营养,多吃一些富含锌的食物,如牡蛎等贝壳类、鱼虾、牛肉、鸡蛋与豆制品。