一旦因噪音或抗生素遭受损失，就难以再生。

So, Once they are lost in response to a toxic sound or to an antibiotic it cannot be regenerated by natural means.

youdao

对于防范舞弊、减少损失、提高资本的再生能力具有积极的意义。

To guard against fraud and reduce losses and improve the capacity of renewable sources of capital have a positive significance.

youdao

由于催化剂本身的活性组分几乎没有损失，再生操作也简便易行，再生过程中损失小。

Due to its little loss of the active components, the regeneration operation is very simple and feasible with little loss during the regeneration process.

youdao

So,Once they are lost in response to a toxic sound or to an antibiotic it cannot be regenerated by natural means.

一旦因噪音或抗生素遭受损失,就难以再生。

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