They prove wonderfully effective at first, only to dwindle into uselessness.

刚开始效果都非常不错，不料后来竟渐渐失效。

youdao

Moreover, on visualizing thefacial expression of friends when they receive the reply — reburned lingering anger rather thansurprised delight — my tiny amount of determination dwindle into naught.

再想象朋友接信时的表情，不是喜出望外，而是余怒重炽，你那一点决心就整个崩溃了。

youdao

The same is true with setbacks: Watching one's nest egg dwindle is enough to pull anyone into a deep hole, but a year later, people typically rebound.

对挫折来说同样如此：看到别人的储蓄金缩水足以让人们感到跌入深渊，但一年过后，人们就会振作起来。

youdao

He implies that all experts have their seasons and then dwindle into irrelevance.

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The risk for Mr Venizelos and Pasok is that, having already lost so many votes to radical leftists like Syriza, they will be seen by the electorate as synonymous with the right, and may dwindle into insignificance at the next election.

BBC: Profile: Greek Pasok leader Evangelos Venizelos

The dilemma for Paris has been painful: to intervene - and be caricatured as a throw-back to the neo-colonialism of "la Francafrique" - or not to intervene, and see a first chance to stand tall on the African continent dwindle into the desert sands?

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