With its quicksands the river usually drowns a few unwary visitors every season.河里有流沙, 每个季节都有几名游客不小心溺亡。

Unwary investors may be lured by the vast array of investment opportunities on the Internet.不警醒的投资者可能会受到因特网上各色投资机会的诱惑。

Specialist subjects are full of pitfalls for the unwary.专业问题充满陷阱, 专套粗心大意的人。