I banked some blood just in case something went wrong.

为以防万一我去存储了些血样。

I know what she meant. -We wouldn't have noticed if John not alerted us to recent discrepancies at other hospital blood banks in the county.

我知道她是什么意思。-我们都没注意到要不是John提醒我们注意郡里另一家医院的血库最近数据的差异。