outer field

• adj. 外层的

例句

用作形容词 (adj.)

1. It appears that the outer ditch was dug with wooden and bone implements.
   有迹象表明外层的壕沟是由木制和骨制的工具挖成的。
2. The rearrangement of the blastula into a three-dimensional organism with inner, middle, and outer layers occurs during gastrulation.
   在原肠胚形成过程中，囊胚重新排列，形成包括内层，中层，外层的三围组织。