Persistent deciduous teeth
[医] 永存乳牙
🧩 词语组成解析
persistent
[pə'sistənt]
adj. 持续的;坚持不懈的;持久的;坚持不渝;
teeth
[ti:θ]
n. 牙( tooth的名词复数 );齿;齿状部份;致力于（ 有难度的事）;tooth的复数形式;（组织、法律等）强大有效;不顾危险（或反对等）;
🗣️ 情景例句
Those were great days and we were very happy.
那些日子美好极了，我们过得很幸福。
The problem is far from easy.
这问题绝非易事。
If then we are so certain that other intelligent life exists in the universe,
既然我们如此坚信宇宙中存在着其他有智力的生命，