needful

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A good law is needful for the good of the people.
一部好的法律对人民是必要的。
"Take all needful precautions," replied the inspector.
“必须采取一切必要的防范措施。” 巡查员说。
I mentioned planning to buy some small needful things, like infant Tylenol, while you travel.
我提到提前购买一些小需要的东西，比如婴儿泰诺。

Needful diversions of wealth and of strength from the fields of peaceful industry to the national defense have not arrested the plow, the shuttle,or the ship;
We not only have a right to our lives but to do whatever we regard as needful to protect our lives.
这种权利不仅适用于我们的生活,还适用于我们所认为的一切可以,维护生活所需的行为。
耶鲁公开课 - 政治哲学导论课程节选
A good law," he says in chapter 30, "is that which is needful for the good of the people."
霍布斯在书的第30章说，一部好的法律,对维护人民的福祉是非常必要的“
耶鲁公开课 - 政治哲学导论课程节选

For now, our secrets remained shrouded, like articles of faith — to be activated when needful, and (like most certainties) otherwise forgotten.
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