词汇：milestone

n. 里程碑，划时代的事件

相关场景

Sputnik is a milestone in history.

>> 火箭小子-十月的天空 1999 October Sky Movie Script

[Switch Clicks] [Motor Humming] The satellite which the Russians have dubbed Sputnik... is being hailed as a milestone in history.

>> 火箭小子-十月的天空 1999 October Sky Movie Script