It's no foolproof vaccine, but the researchers who conducted the 2.5-year trial contend it's the first-ever hope of thwarting the spread of HIV and AIDS.

这并不是一种万无一失的疫苗，但经过两年半试验，研究人员认为它为抗击艾滋病病毒和防止艾滋病蔓延带来第一缕曙光。

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Technology is a tremendous advance, and I wouldn't have it any other way, but make no mistake, the technology is not foolproof.

技术是一个巨大的的进步，我不会有任何其他方式，但不要搞错，技术不是万无一失。

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There's no such thing as a foolproof trading indicator, but here's one that comes remarkably close.

FORBES: The T. Rowe Small-Cap Gauge

But he added no anti-terror measure "of this kind" is "foolproof".

BBC: Labour questions TPims as terror suspect absconds