Track 2.4

스피커

• Speaker 1 0:00
• Speaker 2 0:05
• Speaker 3 0:07
• Speaker 4 1:10
• Speaker 5 1:44
• Speaker 6 2:02
• Speaker 7 2:40

1. 0:00

   장 1: Track 2 . 70s · Speaker 1

   Track 2 .4, Unit 2, Listening 2. Good afternoon, class. Today, we're going to continue talking about circadian rhythm. And today's lecture is about sleep. There are two questions I'd like to discuss with you. First, is there a normal or typ…

2. 1:10

   장 2: Now, it's true that a monophasic sleep cycle is typical for most people. 89s · Speaker 4

   Now, it's true that a monophasic sleep cycle is typical for most people. However, there are some cultures where a biphasic cycle is normal. Let me explain. Bi means two. Biphasic sleepers have two sleep periods a day. In some countries, lik…

3. 2:40

   장 3: truck drivers, and yes, students. 62s · Speaker 7

   truck drivers, and yes, students. Especially at exam time. The problem with a multiphasic sleep cycle is that it's not healthy. It interrupts the body's natural circadian rhythm, the clock in our brain. As a result, people may feel tired al…