Because healthy savings rates are one of the surest indicators of a country's long-term financial health.

因为健康的储蓄率是衡量一个国家长期金融健康状况最可靠的指标之一。

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Similarly, a plant or animal cannot squander all its energy on growing a big body if none would be left over for reproduction, for this is the surest way to extinction.

同样，如果一种植物或动物没有留下任何可以繁殖的后代，它就不能把所有的能量浪费在使自己变得更强壮上，因为这是最可能走向灭绝的方式。

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On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.

在地球上，人们认为，表明太阳黑子周期最可靠的迹象之一是树木的生长速度，就像树干横截面上可见的年轮一样。

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He felt this was the surest way to save the lives of the hostages.

VOA: special.2009.07.02

Now the surest sign of a hurdle is one of those pointed literary allusions that Milton makes in Lycidas, one of those remote allusions that Johnson had complained about.

如今关于这道坎的最确定无疑的迹象就是,他在里作出的那些文学臆想,即约翰逊曾经抱怨过的那些不切实际的幻想。

耶鲁公开课 - 弥尔顿课程节选

Network Rail said the surest way to prevent any accidents was to close level crossings.

BBC: Level crossings: Wales safety work after 33 near misses

In this economy, a higher education is the surest route to the middle class.

WHITEHOUSE: President Obama Speaks on the Economy

Perhaps the surest bet is Justin Bieber for Best New Artist, a five-to-two favorite.

FORBES: Best Bets for Grammy Glory: Jay-Z, Eminem, Justin Bieber