色谱参数在QSAR中的应用开辟了一个新的领域，即定量保留活性关系(QRAR)。

The application of chromatographic parameters in QSAR give rise to a new field, namely, quantitative retention-activity relationship (QRAR).

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他通过对他的过滤系统进行调整，保留一定量的鱼的排泄物在水里，这样的话，植物就可以和鱼共生于一池了。

By tweaking his filtration system to leave a certain amount of fish waste in the water, plants can be grown in the same tank.

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本文对半纤维素在纸张抄造过程中的作用进行了阐述，指出了加入和保留一定量的半纤维素对纸张物理强度的影响。

This paper describes the use of Hemicellulose on the paper production process and points out the impact on paper physical strength because of entering and keeping a rational Hemicellulose.

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