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...
He has set himself up as a crusader for higher press and broadcasting standards.他自认是一位追求更高的新闻和广播标准的斗士。Interworking between the standards is in this way assured.这样可保证标准间的互通.The report underlined his concern that standards...
The team has been plagued by indecision and internal divisions.优柔寡断与内部分裂深深困扰着该团队。Sarah had been plagued continually by a series of minor illnesses.萨拉一直小病缠身。We are always plagued by wasps in autumn.每年秋天，我们这里总是黄蜂成灾。...