已成年：指人或其他生物已经完成了身体的生长，不会再长高了。
(of animals) fully developed
同义词： adult / big / full-grown / grown / grownup
... （有能力的） able; capable: （成熟） fully developed; fully grown: （已定的; 现成的） established; ready-made: ...
When fully grown, however, the crabs can readily withstand tidal currents without burrowing, and thus they acquire substantial populations of barnacles.
然而，当蟹完全长大后，它们不需要穴居就能很容易地承受潮汐流，因此它们获得了大量的藤壶。
Green leaves have grown on the new sprouts, but they have not fully grown yet.
新芽上长出了绿叶，但还没有完全发育。
Stem cell researchers have found a way to get perfectly usable stem cells from fully grown human beings.
干细胞研究人员已经找到了一种从成年人身上获得完全可用的干细胞的方法。
This return to normalcy occurred just four months after the surgical procedure, with newly grown cartilage fully covering the joint surface.
VOA : standard.2010.08.11
And then we let the ball develop into a fully grown inner ear.
接下来，我们让泡囊发育成一个成熟的内耳。
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stem cell researchers have found a way to get perfectly usable stem cells from fully grown human beings.
干细胞研究者已经找到了一种方法，
可以从成年人身上获取可用的干细胞。
SpeakingMax英语口语达人 : 干细胞和伦理
It was not a very big lion, not fully grown, but it was no bobcat.
By the time they were fully grown, they would follow me down the streets of SoHo, off-leash.
The Quebec group is now waiting to see if the fully grown trees will be equally protected.