twin formation

例句：

1. 1. Twin formation is a common phenomenon in the ocean.
   双胞胎形成是海洋中常见的现象。
2. 2.The twins were born with identical features, resembling each other like twins.
   这对双胞胎出生时特征相同，彼此相似如同双胞胎。
3. 3. The study of twin formation has led to new insights into the genetics of human development.
   对双胞胎形成的研究为人类发展遗传学提供了新的见解。