Tooth fusion
[醫(yī)] 牙融合
?? 詞語組成解析
tooth
[tu:θ]
n. 牙;齒;齒狀部份;
vt. 給…裝齒;
vi. 嚙合;
fusion
['fju:??n]
n. 融合;熔解，熔化;融合物;[物]核聚變;
??? 情景例句
Why?
怎樣？
They will miss him very much when he leaves home for the first time.
李明第一次離開家，他們會(huì)非常想念他的。
There are four seasons in the year here--spring, summer, autumn and winter.
這兒一年有四季--春、夏、秋、冬。