时刻

In a sentence

• 无论遇到什么困难，我们都要保持清醒的时刻。

  No matter what challenges we face, we must stay vigilant at all times.

  Here, '时刻' implies a constant state of mind, referring to 'times' in a sustained manner.

• 在关键的时刻，他表现出了非凡的勇气。

  At a crucial moment, he demonstrated extraordinary bravery.

  '时刻' is used here to indicate a specific important moment, meaning 'moment, juncture'.

• 作为一位医生，他时刻关注病人的状况。

  As a doctor, he constantly pays attention to his patients' conditions.

  Here, '时刻' conveys the meaning of consistently or always, denoting an ongoing action or state.