Desmodontium
牙週纤维
🗣️ 情景例句
I'm very sorry.
非常抱歉。
What shall I send him for his Christmas?
我要送他什么东西作为圣诞礼物？
Which would you like, a cup of tea or a glass of milk?
你想来点什么，一杯茶还是一杯牛奶？