氏族成员在他们处于忧患困难之时彼此相互援助.In their trials and difficulties the members of the gens assisted each other.所以明星每时每刻都必须保持忧患意识.So star at times to maintain a sense of crisis.那些吵吵闹闹的邻居成了我生活中的一大忧患.Those noisy neighbours are the bane...
雄伟的加沙金字塔矗立在我们面前。There rose before us the great pyramid of Gaza.这栋大楼外观雄伟，与照片中所见一模一样。The building looked as impressive in actuality as it did in photographs.一排雄伟壮观的榆树a line of stately elms...
在脱落过程中生长素与脱落酸有拮抗作用。It is antagonistic abscisic acid in abscission.生长素主要是从旺盛生长新梢上正在发育的幼叶产生出来.Auxins are produced mainly by young developing leaves on actively growing shoots.当一植物对不平衡地施用生长素起反应时, 总是产生乙烯.Whenever a plant res...