基本解释[生物學]營養層英汉例句雙語例句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，內部營養層和羢氈層搆成。nutritive layer更多例句专业释义生物學營養層