leaf n. (pl. leaves) 1.葉;〔集合詞〕葉子;茶葉,煙葉。 2.花瓣。 3.(書刊等的)一張(兩面)。 4.金屬薄片,箔。 5.【建筑】葉飾。 6.(門等的)頁扇。 7.(可折疊的)活動桌面;(辦公桌等的)桌蓋。 8.(飛機的)天窗。 9.(步槍的)瞄準尺;【機械工程】小輪齒。 10.〔英方〕帽邊。 11.(汽車等片彈簧的)簧片。 shed leaves (樹)落葉。 a rose leaf 一片玫瑰花花瓣。 come into leaf 長葉,發(fā)芽。 in leaf 生葉子的,葉茂盛的。 leaves without figs 空談,口惠而實不至。 take a leaf out of sb.'s book 模仿某人。 the fall of the leaf 落葉時;秋天。 turn over a new leaf 翻開新的一頁;革面洗心,過新生活。 vi. 1.生葉,長葉。 2.〔美國〕翻書頁。 The trees are beginning to leaf out. 樹木正在開始長葉。 leaf through a book 把書翻閱一遍。 vt. 翻…的書頁。 adj. -ed 有葉的。 adj. -less 無葉的。 n. 〔英軍俚〕休假。
Removal of flowers and pods from flowering soybean plants also delays leaf aging . 從正在開花的大豆的植株中摘除化和莢也能推遲葉子的衰老。
Corresponding relationship of maize leaf age index , ear differentiation and shape 玉米葉齡指數(shù)與穗分化及外部形態(tài)的對應(yīng)關(guān)系
Leaf age index 葉齡指數(shù)
The experiment of the influences of throwing cultivation of different leaf age on the output of till - less seedling throwing rice 不同葉齡拋栽對免耕拋秧稻產(chǎn)量的影響試驗
Like most plant hormones , cytokinins also have other effects , including the prevention of leaf aging , or senescence 如同大多數(shù)植物激素,細胞分裂素很有其他功效,包括阻止葉片老化或衰老。
Scientists have long thought that the bright colors of autumn foliage were just the by - product of how leaves age when they cease photosynthesis , but hagen and his colleagues report that the earlier and the more trees changed color , the less damage from chewing occurred the following season 長久以來,科學家都認為秋天鮮?的樹葉顏色,不過是葉子老化、不再行光合作用后的副產(chǎn)品罷了;然而哈根及同事的報告卻指出,如果樹木變色的時間越早、數(shù)量越多,下一季受到蟲咬的傷害就越低。
When sparsely - planted rice overgrew its earing period , light intensity in the mid - lower part increased , photosynthesis prolonged , activity of nitrate and peroxide decreased , protein content increased by more than 50 % , velocity of leaf ageing slowed , but accumulation of dry matter of grain accelerated and 1000 - grain weight increased too 摘要稀植栽培的水稻,抽穗后田間表現(xiàn)為中下部光強明顯增加,光合作用時間延長,硝酸還原酶和過氧化物酶活性降低,蛋白質(zhì)含量增加50 %以上,葉片衰老延緩,籽粒干物質(zhì)積累加速,千粒重提高。