初生合点吸器沿着胚珠的维管组织分支.The primary chalazal haustorium ramifies around the vascular tissues of the ovule.大多数种子的形成是从胚珠受精开始的.Seed development in most instances commences following fertilization of the ovule.只有少数林木可以从未授粉的胚珠发育成有活...
An EKG test measures the rate and regularity of your child's heartbeat.心电图能够测量出孩子的心跳的速度和规则性.Objective To assess the EKG occurring in acute barium poisoning.目的探讨急性钡中毒时心电图异常的临床意义.I leaned over the EKG machine.我倚着心电图机....