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学员疑问：老师，下面这个句子最后的required for reliable weather forecasting不太能理解。
These new observational capabilities would result in simply a mass of details were it not for the fact that theoretical understanding has reached the stage at which it is becoming possible to indicate the kind of measurements required for reliable weather forecasting.
老师解答： required for reliable weather forecasting是非谓语动词的过去分词做后置定语修饰前面的名词the kind of measurements，表达与前面名词的被动关系。句意：理论上的认识已达到了这样一个阶段, 即现在已能指出需要哪种测量方式才能可靠地预报天气。如果做不到这一点，那么上述这些新的观察能力只不过提供了一大堆细节而已。
点评分析：非谓语动词的形式和用法比较多，建议学习语法整体梳理一下这个知识点。
