用体外培养法观察了小鼠胚胎脑细胞在生长发育中形态的变化。
We have observed the morphological evolution of mouse embryonic encephalic cells when they are growing and developing in culture.
植物在生长发育中时常要受到不良环境的胁迫，如盐渍、干旱、低温等。
The plant often suffer from adverse environmental stresses during the growth such as salinity, drought and low temperature etc.
换言之，大脑的某些关键区域在青少年时期还处在生长发育中，对毒品和酒精的有害影响因而也更敏感。
In other words, key areas of the brain are still under construction during the adolescent years, and are more sensitive to the toxic effects of drugs and alcohol.
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