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breakthrough
/bɹˈeɪkθɹuː/
/ˈbɹeɪkˌθɹu/
Examples
1. Scientists believe that a major breakthrough is on the horizon.
2. By this time next year, they will still be living on borrowed time unless a breakthrough is made in medical research.
3. The scientist's experiments failed many times before she finally achieved her breakthrough, but she kept trying with the belief that if at first you do not succeed, try, try again.
4. So breakthroughs certainly take time.
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