adj.到達(dá)青(少)年期的；變年輕的

When people grow up to juvenescent phase, the amount of stem cells in the body falls sharply, due to the apoptosis of adult stem cell under the pressure of internal environment. 人的成長(zhǎng)發(fā)育進(jìn)入青年期，機(jī)體內(nèi)各種成體干細(xì)胞的數(shù)量急劇減少，起原因成體干細(xì)胞在體內(nèi)外環(huán)境的壓力下逐漸凋亡；

adj.返老還童的；使返老還童的；回春的