big ideas 大概念；有价值的想法；重要概念；奇思妙想；大理念

【例句】
Reveal your big ideas to a different audience this time. Some will scoff at it, but others will encourage you with helpful suggestions.
把你的重大想法告诉另一个听众，有的人会取笑你，但其他人会对你提出有用的建议来鼓励你。

You have to have big ideas, but you've got to have the energy to get them done, which can sometimes take a long time.
你是要有了大想法，但你必须有力量来实现它们，有时是要花很长时间的。