It is the unexpected that always happens.意外的事常常发生。
谚语是用了强调句型。一般句型就是The unexpected always happens.
同样意思,说法稍有改变的谚语还有:
Something unexpected always happens.或
Nothing is so certain as the unexpected.
意外的事常会发生/必会发生。
还有一句从法语译过来的谚语:
Nothing is certain but uncertainty.或
Nothing is certain but the unforeseen.
除了不可肯定的/不可预见的,没有是肯定的。
近似意思的还有:
Misfortunes come at night.
祸常生于不测。
中国也有类似意思的俗语:“天有不测风云,人有旦夕祸福。”这些都劝告人们考虑事情要十分周到,要估计到有些意外的事会发生。
近似意思的谚语还可参阅There's many a slip 'twixt the cup and the lip.