The chain extender is used to convert the low-activity hydroxy groups of both ends of the polydimethylsiloxane into high-activity isocyanate groups.

扩链剂是用来将聚二甲基硅氧烷两端活性较弱的羟基转变为高活性的异氰酸酯基。

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He does not foresee legal battles over church buildings if groups of Anglicans do decide to convert to Rome in large numbers.

BBC: Anglicans thinking of Rome 'must not become a sect'

First, Hezbollah obviously has ways to either bribe or convert so- called marginal and indigenous groups in Latin America that had already developed anti-system ideologies, and, consequently, have a predisposition to make alliances with other groups that also detest the system and identify with the oppressed.

CENTERFORSECURITYPOLICY: Latin America's radical grassroots