Describes an aged person with missing teeth and sparse or balding hair, indicating the physical decline associated with advanced old age.
老爷爷虽然年岁已高，但精神矍铄，丝毫没有齿豁头童的老态。
Although the old grandpa is advanced in years, he is still full of vigor, showing no signs of the decrepit appearance of gapped teeth and sparse hair.
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