胚

例句与用法

At the time of shedding they contain undifferentiated embryos of no more than a few hundred cells .
在脱落的时候，它们含有不超过几百个细胞而未分化的胚。
By the time the seed coat and embryo have become fully embedded, the seed has lost its typical oval shape .
当种皮及胚充分吸胀时，种子就失去典型的椭圆形。
As the development of the hypocotyl continues, the characteristic crook in the upper portion becomes apparent .
由于下胚轴继续发音，上部特有的弯曲变得明显。
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。