| 释义 |
- 扩张子宫颈及刮宫（dilation and curettage）
- 1
There are a number of vitamins that are vital for good hair health, the main ones being vitamins C, D and E, and in a balanced diet all these vitamins should be readily available. 有许多对头发健康至关重要的维生素，主要有维生素C、D和E，而在平衡的饮食中所有这些维生素应该很容易获得。 - 2
Three other types of airspace, Classes D, C and B, govern the vicinity of airports. 其他三种领空，D、C 和 B 类，管理着机场周围地区。 - 3
In the A, B, C, D and F grading system, the first four letters are typically considered passing grades. 在 A、B、C、D 和 F 评分体系中，前四个字母通常被认为是及格。
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