Conversely, if homework matters, it should account for a significant portion of the grade.

相反，如果家庭作业很重要，它应该占分数的很大一部分。

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And,he notes, a significant portion of Venezuela's dwindling oil production is donated to Cuba and other leftist-led countries.

VOA: standard.2010.08.06

Marc Morial,Chief Executive Officer of the National Urban League, says minorities make up a significant portion of the 40 million or more Americans without health insurance.

VOA: standard.2009.09.09

Vornado Realty Trust sold a significant portion of its stake in the retailer.

FORBES: Ron Johnson Out At J.C. Penney, Replaced By Former Chief Mike Ullman

Most corporate IT departments now allocate a significant portion of their budgets to information security.

FORBES: Humans: The Weakest Link In Information Security

The sum invested was "a significant portion of my personal money, " Mr. Pellegrini says.

WSJ: Paulson Ex-Lieutenant Caught in Fund's Slide