常常模仿，却无法复制。原本的总是最好的。

Often imitated, never duplicated. The original is always the best.

youdao

显然，现在还有一些限制，当某人想暴露同一个资源的多个版本的时候，却无法复制它的实体数据。

Obviously this has some limitations when one want to expose multiple versions of the same resource without duplicating the entity data.

youdao

We've talked about killing a virus by cross-linking it, for example, to make a substance that looks like a vaccine-- looks like a virus but can't replicate.

例如,我们谈论过,通过蛋白交联来杀死病毒,以便制造出一种类似疫苗,应该是类似病毒但却无法进行复制的物质

耶鲁公开课 - 生物医学工程探索课程节选

So, you cross link all the proteins in the virus, and you make a particle that looks like a virus but it can't act like a virus any longer because it can't replicate.

当病毒中所有的蛋白质交联后,就得到了一种看上去像病毒,却无法致病的病毒,因为这种病毒不能进行复制

耶鲁公开课 - 生物医学工程探索课程节选