LL: Li Hua, don't bother buying any of those. They're just cheap knock-offs.
LL: Yeah. A "knock-off" is a fake, an imitation of the real thing.
LL: Well, if you can't afford the real thing, why would you want to buy a cheap knock-off?
LL: Well, it's your decision whether you want to buy a knock-off.
LL: Hey, look that vendor is selling knock-offs of famous paintings. Some of them are pretty good.
LH: 真的耶！这些仿冒的艺术画看起来和真品一样，模仿得真像！ 不知道是不是那个卖画的人自己画的。
LL: It's possible. He might be an art student and practices his skill by making knock-offs of famous masterpieces.
LL: I know. When I was in China, I bought several and brought them back to my friends as gifts.
LL: The important thing is not whether the paintings were knock-offs but rather that they made my friends happy.
LL: Wow, Li Hua. I'm really running on empty. Do you mind if we go back home now?
LH: Running-on-empty? 什么是“running on empty"? 你不舒服，想回家了？
LL: No, "running on empty" means that I'm exhausted and I don't have any energy. I feel like a car whose gas tank is empty.
LH: 噢，你用汽车没有油来比喻，我就知道了。Running on empty就是很累，一点劲儿都没有了。或许我们可以找点东西吃。你可以补充一下体力。
LL: That might help a little, but I really need to go home and get some rest.
LH: 对了，你前两天感冒刚好，所以才会觉得running on empty。好吧，那我们就买点东西吃。休息一下，然后就回家。
LL: That sounds like a good idea to me. When I'm running on empty, food and sleep are always the best remedies.
LL: It's kind of difficult to enjoy the park when you're running on empty.
LL: Hopefully, by tomorrow, I won't be running on empty anymore and we can enjoy a nice walk in the park.
今天李华学到两个常用语。第一个是knock-off，是指假的，仿冒的东西。另一个常用语是running on empty，是形容一个人很累，体力不足。