中风使他的右半身永久受损。
总有一天,我们也许能够利用端粒酶使任何细胞保持活力,使其正常工作并永久地自我复制。
Someday we may be able to take any cell and keep it alive functioning and reproducing itself essentially forever through the use of telomerase.
但是直到1500年,一个永久的教皇使职,或者说是驻外部门,才在威尼斯设立。
But it was not until 1500 that a permanent nunciature, or diplomatic service, was established, in Venice.
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