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。

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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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After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.

听到问题后，必须从A、B、C、D四个选项中选出最佳选项。

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The boys usually win." In Washington,D.C., thousands of people will attend a concert with performances by musicians including Reba McIntire, Darius Rucker and Gladys Knight.

VOA: special.2010.07.02

Again I should have said first, index 0, the first one. I can similarly go in and say I'd like all the things between index 2 and index 4. And again, remember what a b c that does. Index 2 says start a 0. 1, 2. So a, b, c.

我还是要说一遍，索引为0的元素，是第一个元素，我可以要求返回索引,2和4之前的所有元素，请记住2,是从0开始的,那么0，1，2对应的是。

麻省理工公开课 - 计算机科学及编程导论课程节选

which is one of the few museums in D.C. that actually isn't free because it's not a national museum.

那是特区里少有的几个收费博物馆之一，因为它不是国家博物馆。

大都会艺术博物馆 - SpeakingMax英语口语达人

Gender hiring improved from a D to a C among senior team administration, but it remained an F among team vice presidents.

WSJ: MLB improves diversity among senior administration

Gamers got a pair of spaceship shooters from Bethesda Softworks (Star Trek: Legacy) and Paramount Digital Entertainment (Star Trek: D-A-C) before Cryptic Studios launched Star Trek Online in 2010.

FORBES: Star Trek Into Darkness Weak $84 Million Domestic Box Office Follows Paramount Video Game Flop

Ironically, the Star Trek D-A-C downloadable PC and console game from the first film ended up scoring higher across the board on Metacritic (50 PC, 53 Xbox Live) than the much more expensive shooter that had such promise.

FORBES: Star Trek Into Darkness Weak $84 Million Domestic Box Office Follows Paramount Video Game Flop