only

• 唯一可行的道路

  the only path to take

• 唯一正确的路线

  the only correct route

• 唯一合法的政府

  the only legitimate government

• 这是唯一的办法。

  This is the only way.

• 他是唯一知道这事的人。

  He's the only one who knows about this matter.

• 社会实践是检验真理的唯一标准。

  Putting something into practice in society is the sole criterion for testing the truth.