The reactive species, which may be a free-radical, adds to a monomer molecule by opening the p-bond to form a new radical.

这个带有自由基的反应种通过打开双键加入到单体分子上，从而形成新的自由基。

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We have large order this time, we hope you can agree to D/P terms, for we have to pay a deposit in opening a letter of credit that is time-consuming and costly.

考虑到我们订单数量很大，希望你们能接受付款交单的付款方式，因为开信用证既耗时间又费钱。

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The results show that brittle fracture occurs in matrix and the P-WCMOD(crack mouth opening displacement) curve is linear till loading to failure.

实验结果表明：水泥基体发生脆性断裂，从加载到试件破坏P-WCMOD曲线一直呈线性；

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In Dallas, Elizabeth Etier and her sister Emily McKenzie said they had heard that some consumers and workers were angry that stores were opening earlier than ever on Thanksgiving Day, but they said they were grateful for Target's 9 p.m. opening.

WSJ: Early Holiday Sales Pay Off, for Now

Target is opening at 9 p.m. on Thanksgiving, while Sears and Walmart will open at 8 p.m.

FORBES: With Thanksgiving-Night Openings, Do Retailers Risk Busting More Than Doors?

The department said it planned to move a middle-grade charter school Brooklyn East Collegiate, a member of the Uncommon Schools charter chain into the space opening up at P.

FORBES: New York Public School Battles City Over Charter