a. not capable of being stopped
a. 无法停止的, 不可阻碍的
1. She has an unstoppable determination to succeed in her career.
她在事业上有一种不可阻挡的决心。
2. The team's energy was unstoppable, and they won the championship.
这个团队的活力不可阻挡，他们赢得了冠军。
3. His enthusiasm for learning new things is simply unstoppable.
他对学习新事物的热情简直是不可阻挡的。