In a way , our peculiarly American failure to come to terms with Darwin s theory and what its become since 1859 is a sign of something broader : our failure to come to terms with science and the teaching of science.
主干分析：
Our failure is a sign of something broader
其他成分：
to come to terms with Darwin s theory and what its become since 1859定语修饰failure;冒号后的内容解释说明something;
难点分析：
句子有一个固定词组：come to terms with 向...妥协，接受
翻译：
从某种程度上讲，我们按照特有的美国人的方式拒绝接受达尔文的理论以及其在1859年后的变化，就表明了一些更宽泛的事情：我们未能接受科学和科学的教育。
翻译点拨：
Failure不要翻译成名词，而翻译为动词，未能接受=拒绝接受。