adult cow vitreous的用法和样例：
- Researchers in Japan have cloned eight calves from the cells of a single adult cow.
- Fourteen linear type traits were introduced for Simmental cattle in China, includingMontbeliard and Flechvieh in total of 70 adult cows.
- The cow began to ruminate after eating up grass.
- Let's not make a sacred cow of the monarchy.
- The cow's tail flicked from side to side.