Tectrix
n. [鸟]覆羽(指蔽覆羽翮基部的羽毛)
🗣️ 情景例句
Maybe you can teach me how to work on a computer someday.
改天你教教我如何使用电脑吧。
To fall to pass the exam
考试落榜
Cancer is a deadly disease.
癌症是一种致命的疾病。