Osteodentine
[醫]骨性牙質
??? 情景例句
Play it cool.
做事要冷靜。
How can I get in touch with you?
我要怎樣聯絡你呢？
The trousers are all right; now the jacket; aha, right again!
褲子也合身；再穿上這件上衣；啊哈，又很合適！