这样的幼苗具有伸长的下胚轴或上胚轴的特征.Such seedlings are characterized by having elongated hypocotyls or epicotyls.萌发开始时, 下胚轴依靠细胞增大而迅速伸长.At the onset of germination, the hypocotyl elongates rapidly by cell enlargement.有人发现,钙能抑制黄瓜胚轴的伸长.It...
The helicopter rotor blade deicing technique is greatly important to ensure the flight safe - ty.直升机旋翼桨叶除冰技术对保证直升机飞行安全是十分重要的.It is best to allow the rotor to rotate freely.最好让转子自由旋转.The rotor has recesses in its three fa...