The neutralization equivalent of the polymer is 750 (theoretical-681).
聚和物的中和当量为750(理论上为681)。
Objective To review the surgical treatment of 681 infants with congenital heart disease.
目的总结681例婴幼儿先天性心脏病外科治疗经验。
Its 681 pages of text are at times as grueling as a forced march across the Mongolian steppe.
它那681页的文本读起来就像在蒙古草原上急行军一样让人累得慌。
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