Lesson 72 Revision 3

Key words:
牛排 niúpái:steak
以为 yǐwéi:to think
算了 suànle:Forget it.
卷子 juànzi:examination paper
既然 jìrán:since
原来 yuánlái:to turn out to be
哪怕 nǎpà:even though
效率 xiàolǜ:efficiency
保护 bǎohù:to protect
两回事 liǎng huí shì:two different things
一回事 yì huí shì:the same thing
静悄悄 jìngqiāoqiāo:very quiet
一张一弛 yìzhāngyìchí:tension alterating with relaxation
话又说回来了 huà yòu shuō huílái le:now that you mentioned it