The mechanism of inorganic UV blocking agents is not so clear as that of the organic UV absorbers.
诸多文献对无机紫外线屏蔽剂机理的认识尚存在可商榷之处。
Use of multiple hormone-blocking agents was associated with a 27 percent increased risk for heart disease.
多重激素阻滞剂的采用会增加27%的心脏病风险。
Based on several years water shutoff practice, current water shutoff methods and blocking agents needs to be improved.
根据几年来的堵水实践，目前的堵水方式和堵剂还须进一步完善、提高。
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