They react by adding other chemical agents at the double bond to form derivatives or polymers.

这些化合物的最大用途在于双键与其它化学物质的反应。

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He sat at the double graveside and wept for a long time, before feeling a "calmness wash over me".

他坐在两座墓中间，哭了好久，直到他感觉到“安宁冲刷了整个我”。

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Westmoreland reveals his secret, "the money's buried under a silo at the Double K Ranch, just outside of Tooele, Utah."

Westmoreland讲出了他的秘密，“那笔钱埋在犹他州Tooele市外的双k农场的一个地窖里。”

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The new loans are double what China pledged at the first Forum on China Africa Cooperation three years ago in Beijing.

VOA: standard.2009.11.08

At this point, we have no other choice but to double up before going to the next energy level, 2px so we'll put a second one in the 2 p x.

在这点上我们没有其他选择,而只有双倍填充,在到下一个能级之前，所以我们放入第二个电子至。

麻省理工公开课 - 化学原理课程节选

But the string, the sentence or the words that we're displaying on the screen, previously you clicked on a little white text field and typed it in, well now you're gonna do the same thing at the keyboard but you're gonna have to sandwich it in between double quotation marks.

这些你想输出到屏幕上的字符串啊，语句啊,单词啊，或者你事先,在白色输入框中敲进去的内容，现在你们需要用键盘做同样的事情,但是你们要写在,双引号之间。

哈佛公开课 - 计算机科学课程节选

"My impression of him was that he did everything at the double and was full of nervous energy, " she said.

BBC: Film about composer Holst found

Huong went to her room to brush her teeth and put on some makeup, and Lili handed me a scrap of paper with our destination a room at the Double Luck Hotel.

NEWYORKER: The House Behind a Weeping Cherry

Beukes also said there had been previous incidents and "allegations of a domestic nature" at the home of the Olympic star and double-amputee runner, who is one of South Africa's and the world's most famous sportsmen and made history at the London Games last year by being the first double-amputee runner to compete at the Olympics.

NPR: Olympian Pistorius Charged With Murder