zone n. 1.【地理】(地)带。 2.区域,范围,界。 3.〔古、诗〕(腰)带。 4.圈,环带。 5.【数学】(球面)带;【物理学】晶带;晶层。 6.〔美国〕(为计算邮包寄费而划分的)邮包区 (= parcel post zone)。 7.【自动化】(穿孔卡片顶部的)三行区。 the frigid [temperate, torrid] zone 寒[温、热]带。 a fortified zone 要塞地带。 the zone of action 作战区域。 a school [business, residence] zone 学校[商业、住宅]区。 the zone of influence 势力范围。 soil zone 土层。 in the zone 〔俚语〕处于颠峰状态。 loose the maiden zone of 破坏…的处女童贞。 zone out (使)变得昏头昏脑,(使)变得昏昏沉沉。 vt. 1.用带圈绕。 2.把…分成地带。
The results showed that the vessel element did n't differentiate after the seeds had imbibied for 6 hours; 6 hours after seeds germination, two loci ? ne below the middle portion of the cotyledon and the other in the lower portion of cotyledon-node zone ( cnz ) initiated the differentiation of vessel element simultaneously, then elongated towards the cotyledonary apex and hypocotyl-root region respectively; eventually the two promoter loci began to interconnect through vessel elements 结果表明:种子吸涨6h,未有导管分子的分化;种子萌发后6小时期间,自子叶中部偏下方和子叶节区下部的两个位点同时启动导管分子的分化,并分别向子叶叶尖和下胚轴-根的方向延伸;尔后,在发生两个启动位点之间发生导管分子的连接。