Gingival crevice
[医] 龈缝, 龈下隙
🧩 词语组成解析
a. 齿龈的\\n[医] 龈的
🗣️ 情景例句
That's alright. You're a lot of help.
没关系。你帮了很大的忙。
To examine the problem
检讨问题
This shows how long it was before we deemed it necessary to make sure that all our children could share in the knowledge accumulated by the'happy few' during the past centuries.
这说明，经过了多么漫长的时间之后，我们才认识到，有必要确保我们的孩子享有多少个世纪以来由‘少数幸运者’所积累起来的知识。