freshwater fish of Central America having a long swordlike tail; popular aquarium fish
双语例句
1. Objective To explore the feasibility about Xiphophorus helleri, Poecilia and Gambusia affinis as test organisms for 7 day subchronic toxicity test .
目的探索红剑鱼、孔雀鱼和食蚊鱼作为实验动物用于七天亚慢性毒性试验材料的可行性。
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2. Therefore, the dwarf mutation in X. helleri is caused by the developmental defect in spinal column, and the vertebral malformation underlies the body type alteration anatomically.
因而推测，剑尾鱼的侏儒突变是由于脊椎的发育缺陷所致，椎体异常是其体型变化的结构基础。
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3. Therefore, the dwarf mutation in X. helleri is caused by the developmental defect in spinal column, and the vertebral malformation underlies the body type alteration anatomically.
因而推测，剑尾鱼的侏儒突变是由于脊椎的发育缺陷所致，椎体异常是其体型变化的结构基础。
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用作名词 (n.)
Studies concerning the feasibility of rearing Xiphophorus helleri using areificial formuladiet to replace living natural food was discussed in this paper. 本文探讨了用人工配合饵料代替天然后饵饲养剑尾鱼的可行性。
