We need to think big.

我们应该考虑干一番大事。

You have to Think Big, Build Small.

你必须高瞻远瞩，兴建小型。

We would say: Think Big!

我们会说：大大地思考！

Groups like to "think big" like this.

团体一样去“认为是伟大的”这样的。

Help people think big.

帮别人看的更高。