Collagens
(collagen 的复数) n. 胶原\\n[化] 骨胶原; 胶原
🗣️ 情景例句
Fine. Good-bye.
好的，再见。
At Xmas time, Debra began to dream of all the presents.
到了圣诞节的时际，黛布拉开始梦想着所有的礼物。
Yes, but what are in the boxes?
哦，那箱子里是什么呢？