a significant or sudden development or discovery; an important achievement
一个重大的或突如其来的发展或发现；一个重要的成就 (yī gè zhòng dà de huò tū rú qí lái de fā zhǎn huò fā xiàn; yī gè zhòng yào de chéng jiù)
"The scientist made a major breakthrough in his research on cancer treatment."
"科学家在癌症治疗研究中取得了一个重大的bùruì kè sū。" (Kēxuéjiā zài áizhèng zhìliáo yánjiū zhōng qǔdéle yīgè zhòngdà de **bùruì kè sū**.)
learning through difficult life experiences
to take a foolish risk that may bring bad luck
to trust or believe in someone or something
to feel encouraged or more confident
to set challenging and ambitious goals
a brilliant and creative idea
