难关

In a sentence

• 在他的领导下，我们成功地克服了这个难关。

  Under his leadership, we successfully overcame this difficulty.

  In this sentence, 难关 refers to a challenging situation that was resolved successfully through combined effort.

• 公司正在经历经济上的难关，所有人都需要齐心协力。

  The company is going through a financial hardship, and everyone needs to work together.

  Here, 难关 is used to describe a current ongoing difficulty, particularly financial, that a group is facing.

• 虽然项目初期遇到了许多难关，但通过大家的努力，我们已经取得了进展。

  Although the project initially faced many challenges, with everyone's efforts, we have made progress.

  In this example, 难关 represents the various obstacles encountered during the initial phase of a project.