Integumentary system
[医] 体被系统
🧩 词语组成解析
a. 外皮的, 包皮的
🗣️ 情景例句
Come in!
进来，
My head has been hurting.
我头痛。
Many of the stars cannot be seen because they are too far away.
许多星星我们之所以看不见，是因为它们离我们太远。