Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.大孢子四分体为线形, 合点端功能大孢子发育成为蓼型胚囊.The chalazal megaspore of a linear tetrad develops into a polygonum type sac.四分体线行排列,合点端的大孢子发育为...
At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.此时每条染色体由一对染色单体构成,这两条联合的染色体称为四分体.Microspore abortion occurred after the tetrad formation.小孢子败育发生在四分体形成以后...
I exchanged the defective tire for a good one.我用一条有毛病的轮胎换一条新的轮胎。Her vision is seriously defective.她的视力有严重缺陷。Evidence is accumulating that a defective gene may be responsible for this disease.越来越多的证据表明该疾病是由一种有缺陷的基因引起的.The...
使用C++语言, 构建了导纳矩阵修改程序.Using C ++ language, constructs an admittance matrix modify program.目的: 探讨频域脑导纳图的实用价值.Objective: into the practic value of frequency field of admittance differential cephalogran.最后利用网络导纳参数的表达式,确定了本征电...
Richard is an actor who knows how to exuberate.理查是个知道如何表现得热情洋溢的演员....with catchy original songs by Richard Warner.以及理查德·沃纳最新创作的朗朗上口的歌曲Richard had turned up on Christmas Eve with Tony...理查德和托尼在圣诞夜一道露面了。She glanced about t...
Stress may act as a trigger for these illnesses.压力可能会成为引发这些疾病的原因。A man pointed a gun at them and pulled the trigger.一名男子拿枪指着他们，接着扣动了扳机。Unresolved or unacknowledged fears can trigger sleepwalking.残留在心里的或不为人知的恐惧都可能引发梦游。...