Fourth, if we can make some safe rules about donating blood, there is no problem in donating blood. It makes us feel safe. From above analysis, I believe donating is a good thing, therefore.

第四点，如果你了解一些关于安全献血的知识后去献血是没有什么坏处的，总结以上几点后，我相信献血是件好事。

youdao

Rules and laws keep everyone safe.

规则和法律保障每个人的安全。

youdao

Teachers make rules to help students learn and stay safe.

老师制定规则以帮助学生学习并保持安全。

youdao

Federal Aviation Administration rules require airports to study the risks of wildlife to safe airport operations.

VOA: special.2009.04.01

Welcome as they are, the safe harbor rules won't turn stingy firms into Santa Clauses.

FORBES: Taxing Matters: Saving to the max

Note: Fidelity's plan doesn't allow loans and uses special "safe harbor" rules that require you to contribute 3% of earnings and, in most cases, to open the account by Oct. 1.

FORBES: Self-Employment

After letting me sweat for a while longer, he explained the rules of safe trading to me once again.

FORBES: Orchestrating Failure