函数原型
tf.keras.layers.Embedding(input_dim, output_dim, embeddings_initializer='uniform',embeddings_regularizer=None, activity_regularizer=None,embeddings_constraint=None, mask_zero=
tf.keras.layers.Embedding(input_dim, output_dim, embeddings_initializer='uniform',embeddings_regularizer=None, activity_regularizer=None,embeddings_constraint=None, mask_zero=