We cannot act blindly; we need to communicate more with the outside world.

我们不能闭门造车，需要多与外界交流。

If you act blindly, you will miss a lot of important information.

如果你闭门造车，你会错过很多重要的信息。

To finish the job, often act blindly.

为完成任务, 往往闭门造车.

But a research can't act blindly, especially in the background of new curriculum reform, need to reference some maturity experience from outside.

然而研究不能“闭门造车”，尤其是在新课程改革的背景之下，还需要参考一些外来的成熟经验。