embryonic nucleus

例句：

1. 1. The embryonic development of the fetus is crucial to its survival.
   胎儿的胚胎发育对其生存至关重要。
2. 2. During the early stages of pregnancy, the embryonic nucleus undergoes significant changes.
   在怀孕的早期阶段，胚胎核经历了显著的变化。
3. 3. The study of embryonic nuclei has led to new insights into the origins of life.
   对胚胎核的研究揭示了生命起源的新见解。