We know all about the "specificity-of-training" rule, but we still skip the occasional running workout to get in some cross-training.

我们对“训练的特殊性”原则一清二楚，但我们还是跳过常规跑步训练，进行交叉训练。

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One of the most fundamental rules of training is specificity;

一个最基本的训练法则是特殊性；

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In fact, this virus is a double stranded DNA virus, the virus has a kind of specificity, strictly in the human epidermis, in vitro tissue or experimental animal model, the difficulty of training.

其实，这种病毒是一种双链DNA病毒，这种病毒具有种属特异性，严格寄居人表皮、体外组织或实验动物模型中，培养困难。

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