The applications of metal mirrors in recent twenty years have also been presented.
简介了近些年来金属反射镜的应用概况。
But in recent twenty years, more and more studies indicate that psoriasis is a t cell-mediated immunity skin disease.
但近二十年，越来越多的研究表明，银屑病是一种T细胞介导的免疫性皮肤病。
In recent twenty years, great fruits have been made in the academic study of history of Chinese Chambers of commerce.
近二十年来，中国商会史的研究已经取得了丰硕的成果。
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