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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Canon's E-TTL II even measures the distance to the main subject and that also becomes part of the evaluation taking place.

佳能的E - TTL II甚至可以测出相机和主要被摄对象间的距离并将此作为测光的考虑因素之一。

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At that time, E-mail and Usenet were the main forums for communication, and simple publishing systems such as Gopher were trying to establish a wider user base.

在当时，电子邮件和Usenet是主要的交流平台，而诸如Gopher这样简单的发布系统则试图建立更广泛的用户群。

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The capture of Pul-e-Khumri would cut the main north-south road through the centre of Afghanistan, leaving the remaining Taleban forces in the north stranded.

BBC: Afghan opposition push through north

However, for those who use their iPads as their main e-readers, and those who use it frequently while away from Wi-Fi coverage, this new model could make a big difference.

WSJ: The New iPad Review: Faster, Sharper and Thicker | Walt Mossberg

E-Trade is discounting fees to the likes of Microsoft, Boeing and Oracle for the right to steer 1 million employees seeking information on their stock options through the main E-Trade portal.

FORBES: After the Bubble