生物学
动情激素
GARCIA-NAVARRO: Campbell has perfected that technique, using a kind of Mata Hari goat, a sterilized female with a hormone implant in her ear that puts her in a constant state of estrus, or heat.
NPR: Common Intruders Threaten Galapagos Species
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。