基本解释低樹層英汉例句雙語例句In shrub-tree stage , the species diversity in tree layer was lower than that of shrub layer .灌喬林過渡堦段群落喬木層物種多樣性指數低，而灌木層多樣性指數高。lower tree layer更多例句词组短语短語lower punch tree layer 低樹層lower tree layer更多词组