Osteoclasts
(osteoclast 的复数) 破骨细胞
🗣️ 情景例句
Don't open the door if you don't know who it is.
如果有陌生人敲门不要开门。
Bind the sack before it be full.
做事应适可而止。
I go to school by bike.
我是骑自行车上学。