Why are some strings cutoff when attempting to read a mixture of numeric and non-numeric input as in the following code?

为什么一些字符串截断试图读取一个数字和非数字输入，如下面的代码混合的时候？

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To consider the effect of low-cutoff energy of non-thermal electrons, it is necessary to calculate with more strict theory of gyro-synchrotron radiation.

为了考虑非热电子低能截止的影响，必须采用更严格的回旋同步辐射理论来计算。

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