面试前，他明显感觉到自己脸上的紧绷感。

He could sense the ___tension on his face before the interview.

演讲前，我感受到明显的紧张感。

I could feel the ___tenseness before giving my speech.

绷紧的绳索的张力确保了桥梁的稳定性。

The ___tenseness of the rope ensures the stability of the bridge.