Usually, age is determined by physical characteristics, such as teeth or bones.

通常说来，年龄是通过生理特征确定的，譬如牙齿或骨骼。

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Usually, age is determined by physical characteristics, such as teeth or bones.

通常说来，年龄是通过生理特征确定的，譬如牙齿或骨骼。

youdao