本文通过研究罗马尼亚s_2油井水泥在高温下形成水泥石的强度衰退规律，提出合理的加砂量并讨论了应加砂的温度范围。

This paper proposed the reasonable amount and the temperature of adding silica flour after studying the strength retrogression of Romania S_2 oil cement at high temperature.

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因此，黄金是相对“抗经济衰退”的，它在2008年的相对强度证明了这点。

As a result, gold is relatively "recession-proof," as evidenced by its relative strength in 2008.

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根据皮层小泡释放强度，可将皮层反应分为潜伏期、发展期、高潮期、衰退期四个时期。

According to the release intensity of the cortex vesicles, cortical reaction can be divided into the latent period, development period, climactic period, declining period.

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