这里的逻辑是parse将在输入流中首先查找一个字符串，然后查找整数，最后查找一个实数。
The logic is that parse will look first for a string, then for an integer, and finally for a real, in that order, in the input stream.
这里的逻辑是parse将在输入流中首先查找一个字符串，然后查找整数，最后查找一个实数。
The logic is that parse will look first for a string, then for an integer, and finally for a real, in that order, in the input stream.
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