他锻炼时肘部附近的肌腱拉伤了。

The tendon near his elbow was ___strained during the workout.

她的笑容看起来很勉强，显然心情不好。

Her smile looked ___strained, clearly showing she was upset.

他们的对话显得很勉强，充满了不自然的沉默。

Their conversation was filled with ___strained pauses and unnatural silence.

他举重时不小心拉伤了肌肉。

He ___strained his muscle while lifting weights.