breakthrough
/ˈbreɪkθruː/noun
1- a sudden, dramatic, and important discovery or development, especially in science（尤指科技方面的）突破; 重要发现; 重大成就：
a major breakthrough in the fight against Aids.
对艾滋病斗争的重大突破。
1.1
- a significant and dramatic overcoming of a perceived obstacle, allowing the completion of a process突破性进展; 突破点：
the metalworkers' agreement was the key breakthrough on pay and conditions.
金属加工工人们的同意使工资和工作条件问题的解决取得了关键性突破。