Dentes fixi
[医] 恒牙
🧩 词语组成解析
齿状部份
🗣️ 情景例句
I had the appointment written on my calendar and was looking forward to the occasion.
我早已把这个约会写在我的日历上而且一直期待着这一时刻。
The statesman retired as the mayor of New York.
那位政治家退休时是纽约市市长。
Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.
只有地球提供理想的条件，而即使在这里，植物和动物的进化也用了40亿年的时间。