Skin color, where you live and how much skin you have exposed all affect how much vitamin D you can produce.

皮肤颜色、生活地点和暴露在外的皮肤面积大小，都会影响你的身体所能产生的维他命D的量。

youdao

For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

每题都有对应标记的A、B、C和D四个选项，请选择最佳选项并在答题卡2的相应字母中间划横线。

youdao

You' d better go to the dentist's now.

你最好现在就去看牙医。

youdao

I'm ashamed to be your father. I'd have horsewhipped you if I had a horse.

VOA: special.2009.07.19

And in the end, when it's at equilibrium, and you look and you'd make a measurement, right, you could do spectroscopy.

当他处于平衡状态的时候，你可以做测量，比方说做光谱分析。

麻省理工公开课 - 热力学与动力学课程节选

Why'd you decide to come to Stanford MBA?

你为什么决定来读斯坦福大学的工商管理硕士呢？

优秀的MBA人们 - SpeakingMax英语口语达人

How were you kicked out, and how'd you manage to even stay as long as you did?

NPR: 'Where We Have Hope': A Journalist on Zimbabwe

When you do a movie in 2-D you can make a mistake and sell it as part of the art.

FORBES: Dancing In Your Face. Director Jon Chu talks 'Step Up 3-D.'

If you were a lizard, you'd think you'd grown a red tail.

WSJ: 2012 Ferrari F12 Berlinetta Review: Tech That Makes Drivers Into Gods | Rumble Seat by Dan Neil