When you say the rope is under tension

当绳子被绷紧
being pulled from both sides by a certain force,

即两端被拉伸时
the tension is not 0 just because this T and that T cancel.

拉力并不为 0 因为这个 T 和那个 T 相互抵消了
It's true the net force is 0,

所受的合力是 0
but it doesn't mean you can ignore it.

但是并不意味着你可以忽略它
Suppose you are being pulled by my favorite animals --

假设我最喜欢的动物
the elephants -- from both sides by equal force.

大象从两边拉你
You don't find any consolation

你不会因为合力是 0
in the fact that these forces add up to 0.

你可以安然无事
You feel the pain.

你会感到疼痛
That pain is what--This gentleman doesn't agree.

这个疼痛就是这位男生不大同意
One of you guys nodding your head.

这位同学在点头