Take action at once before it's too late!

马上采取行动，否则就太晚了！

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Once patients begin to show signs of memory loss, confusion and dementia, they now believe, it may be too late to reverse the damage to brain neurons.

他们认为，一旦病人开始出现像记忆丧失、意识模糊、痴呆等症状时，再去挽回可能已经太迟了。

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Once a pandemic virus appears, it will be too late.

一旦出现大流行型病毒，就将为时太晚。

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His job will be to make sure that authorities no longer allow banking troubles to build up over the years and only intervene in national lenders once it's too late.

WSJ: Economics Guru Jumps

However, amyloid may be only one factor in Alzheimer's, and growing evidence shows that plaques form relatively late in the disease process, leading some scientists to think that attacking amyloid once the clumps have already formed is too late.

WSJ: For Alzheimer's, a Fork in the Road

Yet once you do become incapacitated, it is generally too late legally to make changes in your estate planning documents.

FORBES: Sign A Healthcare Proxy, Living Will And Power Of Attorney