翻译 ： The reason for 。 。。。。

The reason for this is soon made obvious; the imperiled survivors could not take their eyes off the waves, for to let their guard down for a moment would mean certain death.
这个事情的成因很快会明确，这些苦难的幸存者无法不盯住浪潮，因为他们只要放松片刻的警惕就意味着必死无疑。