These tropisms, or affinities of viruses for certain cells, are well mapped out now.

如今病毒对特定细胞的趋向性和亲合力,已经很好地进行了描述

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It sort of mapped out his progression on how he became a director, his thought processes.

它展现了他如何成为导演的过程以及他的思想发展。

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