常見(jiàn)例句雙語(yǔ)例句The anther is made up of an outer epidermis, a middle fibrous layer, and an inner nutritive layer, the tapetum.花葯壁由外表皮層，中間纖維層，內(nèi)部營(yíng)養(yǎng)層和羢氈層搆成。 返回 nutritive layer