They prove wonderfully effective at first, only to dwindleinto uselessness.
刚开始效果都非常不错，不料后来竟渐渐失效。
2
Moreover, on visualizing thefacial expression of friends when they receive the reply — reburned lingering anger rather thansurprised delight — my tiny amount of determination dwindleinto 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。
3
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.