Odontotechny
[医] 牙科技术学, 牙科学
🗣️ 情景例句
Hi!
嗨！
Old birds are not caught with new nests.
新巢捉不到老鸟。
The comparable speed from the Moon is only 1.5 miles per second.
而从月球出发的相应速度只是每秒1。5英里。