Alkali slag cement paste achieved the highest strength only when the Na2O and SiO2 of waterglass were around a certain content.

只有当水玻璃中的氧化纳和二氧化硅在一定范围内才能获得高强度碱矿渣水泥浆体。

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The test manifests adding a certain content of fiber in the mortar can obviously improve the tear and compression resistance, antipenetration and shrinkage.

试验证明，在普通的水泥砂浆中加入一定量的纤维能显著提高砂浆的抗裂抗渗，降低砂浆收缩率，提高抗压抗折强度等。

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The results show that the exchange electrical current density augment with the increase of platinum content of the compound electrode in a certain content range.

实验结果表明，在一定范围内，随着铂炭复合电极中铂含量的增加，其交换电流密度也随之增大。

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The Wall Street Journal is already doing so, of course, but with a different model than the Times: The Journal offers a certain amount of free content for sampling, and its articles are all indexed in Google.

FORBES: Times of London Paywall Paying Off Already!*

But certain decisions have a telling demonstration effect beyond their actual content.

ECONOMIST: Bagehot

Rather than using a certain amount of bandwidth per customer, the technology broke up content into time-stamped packets that could, theoretically, be transmitted to an infinite number of people.

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