多年的失败教训，多年的尝试磨砺，终于取得了重大的科技成就。

Years of failure, years of trying have resulted in great scientific achievements.

youdao

多年的失败教训，多年的尝试磨砺，终于取得了重大的科技成就。

Years of failure, years of trying have resulted in great scientific achievements.

youdao