The new rules call for blood centres to develop more ways to make sure their work is done correctly.
新的规则要求血液中心开发更多的方法来确保他们的工作可正确地实施。
These rules are another way to help keep the blood supply pure.
这些规则是帮助保持血液供应纯净的另一种方式。
The FDA has provided new rules for the blood centres.
FDA 已经为血液中心提供了新的规则。
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