Lacuna cementum
[醫] 牙骨質腔[隙]
?? 詞語組成解析
lacuna
[[l?'kju:n?]]
n. 空白, 空隙, 闕文\\n[醫] 腔隙, 陷窩
n. 牙骨質, 水門汀
??? 情景例句
What did you say? I didn't quite get that.
你說什么？我沒聽清楚。
Mother doesn't approve of her smoking.
母親不贊成她吸煙。
You've done very well. It's a pity you missed the sports meeting last week.
你學得不錯嘛。很可惜，你錯過了上周的運動會。