The hair shaft and inner root sheath move together as the hair grows toward the surface: the outer root sheath remains fixed in position.
毛干和内根鞘当到达体表时融合在一起:外根鞘仍然保持在原来的位置。
The hair shaft and inner root sheath move together as the hair grows toward the surface: the outer root sheath remains fixed in position.
毛干和内根鞘当到达体表时融合在一起:外根鞘仍然保持在原来的位置。
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