...a seemingly unstoppable barrier... 似乎坚不可摧的屏障
Roberto is unstoppable! He's incredible! 罗伯托锐不可挡 他真是不可思议
Unstoppable, they can travel thousands of miles... 势不可挡的沙尘暴穿越数千公里
they come together into an unstoppable force 它们便聚集成群 以势不可挡的气势
flowing down the valley with unstoppable force. 一刻不停地刨蚀着深谷