Many forest tree species have multiple archegonia which, after fertilization produce a number of proembryos.许多林木树种都有颈卵器, 受精以后便产生许多原胚.A similar section through the female plant reveals several bottle - shape archegonia , ...
Some managers have recently raised objection to the PFA handling these negotiations.一些主教练最近就英格兰职业足球运动员协会负责这些谈判提出了异议。Polar format algorithm ( PFA ) is a typical image formation algorithm used in spotlight SAR.极坐标格式算法 ( PF...
然而奋斗的结果只给他招来了更多的烦恼和更多的敌人.But his struggles only brought him more troubles and more enemies.不少穷人和新富起来的人都把他看成是个人奋斗的典范.He was idealized as an individualist by many poor or newly rich.他们奋斗的目标是消灭天花.Their goal was to eradicate...