small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control
同义词：poeciliid fish??/??poeciliid??/??live-bearer
freshwater fish of Central America having a long swordlike tail; popular aquarium fish
同义词：swordtail??/??helleri??/??Xyphophorus helleri
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。