When the river dike is completed, the crops will be safe against floods.

修好河堤，庄稼就不怕淹了。

《新英汉大辞典》

This is a disappointing and unexpected setback in the search for a safe and effective microbicide that can be used by women to protect themselves against HIV infection.

在寻找安全有效的杀微生物剂用于妇女保护自己避免艾滋病毒感染的过程中，这是一次令人失望和未预见到的挫折。

youdao

So for any asset, be it cash, U.S. Treasury securities, or supposedly safe mortgages, Banks must hold at least 5% capital against it.

因此，对于任何资产，无论是现金、美国国债、还是据称安全的按揭贷款，银行都必须至少持有相当于资产额5%的资本金。

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The typical clinical trial model may not be best suited for generating evidence that a drug is safe and effective against diseases where patient enrollment can be difficult and diseases progress slowly and unevenly over a long period of time, according to Steven Grossman, who worked on the original Orphan Drug Act in 1983 and is now a policy and regulatory consultant.

FORBES: Orphan Drugs: 'Rare' Opportunities To Make Money

This will be enough people to make China safe against foreign invasions.

FORBES: China's Growing Problem Of Too Many Single Men

But we will not give up on this mission because Afghanistan must never again be a safe haven for al Qaeda to launch attacks against us.

WHITEHOUSE: President Obama and Prime Minister Cameron Hold a Press Conference | The White House