如下表所示，[0][0]的input_1[0][0]含义是什么？
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Layer (type) Output Shape Param # Connected to
===================================================================
input_1 (InputLayer) (None, 1) 0
___________________________________________________________________
dropout_1 (Dropout) (None, 1) 0 input_1[0][0]
___________________________________________________________________
dropout_2 (Dropout) (None, 1) 0 input_1[0][0]
===================================================================
Total params: 0
Trainable params: 0
Non-trainable params: 0
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