例186　One can't be too careful in making the decision to explore the Mars as it was such a critical case and risked being failed without sufficient researches and experiments.

【结构分析】这句话是典型can not...too...，表示再怎么也不过分，是典型的否定表达肯定的用法，这句话的主干是One can't be too careful in making the decision to explore the Mars，后面是原因状语从句as it was such a critical case and risked being failed without sufficient researches and experiments，其中有两个动词并列，分别是was和risked。

【亮点回放】此句话的亮点在于双重否定句套上表示原因的状语从句，很经典，表示原因的状语从句是用as引导，往往表达常识性的原因。

【核心词汇】

careful　仔细

explore the Mars　探测火星

a critical case　一个关键的决定

risk being failed　冒着失败的风险

sufficient researches and experiments　充分地调查和实验

【参考译文】一个人要特别小心去下探测火星的决定，因为这是个很关键的决定而且如果没有充分的调查和实验，可能冒着失败的风险。