这是一个人对某件事不会做出决定时使用的经典口语要素。

Andrew's Note: This is a good phrase to use when someone just won't make a decision about something.

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但设计原理在这点上，同样能够在设计过程中帮助做设计决定时使用。

But design principles can also be used from this point in the process forward to help make design decisions.

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但是，相对于仅使用一个方法测试放射性衰变，研究人员测定时使用了三种元素，铅，钐，钕。

But rather than test the radioactive decay using just one method, the researchers used three, involving the elements lead, samarium and neodymium.

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