单词学习：secondary sexual characteristics 生物学/生理学
secondary sexual characteristics
/ˈsekənderi ˈsekʃuəl ˌkærəktəˈrɪstɪks/
第二性征
In biology class, Mr. Gu explained that secondary sexual characteristics, such as facial hair in males and breast development in females, emerge during puberty.
在生物课上，顾老师解释说，第二性征，比如男性的面部胡须和女性的乳房发育，是在青春期出现的。
单词卡片
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