The fact that sunspots are magnetic fields accounts for their dark appearance.

太阳黑子是磁场的事实解释了它们的黑色外观。

youdao

These participants were asked about their dark chocolate consumption.

这些参与者被要求汇报他们的黑巧克力摄入量。

youdao

Several days later, at about 4 A.M., my mother heard Dad shuffling about their dark room.

几天后，大约凌晨四点，母亲听到父亲拖着脚步在他们漆黑的房间里走来走去。

youdao

The name was given to them by the American Indians, who saw a resemblance between their dark curly hair and the coat of the buffalo.

VOA: standard.2009.11.25

One of them is how the Greeks in the late Dark Ages and in the period in which the polis emerges, made their living.

其中之一是,在黑暗时代末期,以及城邦初现的萌芽时期,希腊人民,是如何生存的

耶鲁公开课 - 古希腊历史简介课程节选

And these really short people with dark skin met them and took them to their city.

然后这些个子很小、深色皮肤的人见到了他们，把他们带到自己的城市去。

神话有趣的课 - SpeakingMax英语口语达人

The policemen with their dark uniforms walked up and down trying to spot trouble.

FORBES: Santa Arrived Too Late

It is 80 degrees outside, but most wear full gear over their dark blue t-shirts.

FORBES: They Did Not Return: Remembering The Men of Engine 22/Ladder 13

For all their conviction, the bears realize it may be awhile before their dark predictions come true.

WSJ: Bad-News Bears Crash the Party