Y: Hey, Patrick，what's wrong? 你怎么一瘸一拐的？
P: Why am I limping? I'm limping because my Achilles tendon is killing me! OW!

Y: Oh my...

P: Uh, Yang Chen, do you know what an Achilles tendon is?

Y: Not really, Patrick.

P: Achilles A-C-H-I-L-L-E-S, tendon T-E-N-D-O-N It is a tendon (腱) in the lower back part of your leg.

Y: Oh, 你是不是和刘翔一样，得了跟腱炎？

P: Yeah, that's right. Just like Liu Xiang. He had a problem with his Achilles tendon, too.

Y: 那你是怎么弄伤了你的Achilles tendon呢？

P: I pulled it during the warm-up for 100 meter hurdles..

Y: That's too bad. (Sarcastically.)

P: Thanks for the sympathy, Yang Chen.

Y: Hey, Patrick, 跟腱为什么叫 "Achilles tendon" 呢?

P: You are really a pain in my Achilles, Yang Chen, Achilles was an ancient Greek hero

Y: Oh, 我知道了，Achilles - 阿基里斯是希腊神话里的勇士。

P: Yeah, He was dunked in a sacred river by his mother, and his mother was holding him by his ankle.

Y: So?

P: So he became invulnerable everywhere the water touched him, except his heel.

Y: 因为他妈妈抓着他的脚后跟，没沾到神水，就成了他的致命弱点。

P: So when someone has a fatal flaw it is referred to as their "Achilles heel". Because Achilles was killed when an arrow struck him in his heel - his only vulnerable spot.

Y: So what's your "Achilles heel," Patrick?

P: Well, I may have a problem with my Achilles tendon, but I don't have an Achilles heel.

Y: Why?

P: I'm perfect!

Y: and modest.

P: Whatever, Yang Chen!