It enhances one's ability to fight disease, improves memory and helps one cope with stress. Neglecting it can result in exhaustion, hallucinations and, in rare instances, even death! Sleep is important, but no one is quite sure why.
Scientists do know that people alternate between two kinds of sleep. Rapid eye movement sleep, REM, is when most humans dream. Deeper NREM (non-rapid eye movement) sleep may help people rest and conserve energy.
Scientists are still investigating the purpose of REM sleep and dreams. Some think dreams help people organize memories by selecting important short-term memories and converting them into long-term ones. Or dreams may exercise people's brains to prepare them for waking up.
Aging
Aging is a part of human life, but it isn't universal to all life. One type of ocean polyp doesn't age and could theoretically live forever. So why can't people live forever?
Some scientists see aging as a feature of human genes. It could be potentially beneficial, but they're not sure exactly how. Others see aging as cell damage that has built up gradually.
Almost everyone takes these processes for granted, but to scientists, they are far from ordinary.
Info Cloud
death
Friends, prepare yourself. Today's info cloud topic is completely different from yesterday's topic of laughter.
Today's topic is death. Now, this isn't a happy or popular topic, but since it is something we can't avoid, we sometimes need to talk about it.
It's a sensitive topic. As such, when we do talk about it, we should use language that is proper and accurate.
Ok, so let's start with a very great tragedy. When someone takes his own life.
Okay, the proper way to say this in English is, "He committed suicide." Now, remember, suicide is a noun, not a verb. So, it is incorrect to say, "He suicided."
It's also incorrect to say a person committed suicide if that person failed to kill himself. If the person still lives, you have to say he attempted to commit suicide.
Right. It's similar for when someone drowns.
Right. If a person has a life and death struggle in the water but lives, we need to say, "He almost or nearly drowned." A person cannot drown and still be alive.
Okay. Enough talk about death. Friends, remember, each day of life is a gift. So, go out and enjoy it.
Language Lab
enhance v. 促進, 提高, 增加 [en字首-使如何如何]
- Exercise can enhance one's immune system.
運動可以提升免疫系統
- The redesigned procedure enhanced the workers' efficiency.
從新設計的程序提升工作人員的效率
hallucination n.幻覺
/həˌlu:səˈneɪʃən/ [重音在後面]
something which you imagine you can see or hear, but which is not really there, or the experience of this
- His hallucinations are caused by a brain tumor.
他的幻覺是腦留造成的
hallucinate v.使產生幻覺
- High
高記量的碼非可能會讓頭腦產生幻覺
theoretically adv. 理論上的，照理說
/ˌθi:jəˈrɛtɪkli/
relating to what is possible or imagined rather than to what is known to be true or real
- Theoretically, tickets for a weekend roadway show are extremely hard to get.
照理說週末的百老匯票是一票難求
theoretical adj.
- The physics course is very theoretical.
這堂的物理課非常著重理論
potentially adv.可能地，潛在地
something that is potentially dangerous, useful etc is not dangerous etc now, but may become so in the future
- This risky investment can potentially ruin the company.
這個風險性極大的投資案很有可能會毀掉這個公司
potential adj. 潛在的, 可能的
- potential customer 潛在客戶
- potential market 潛在巿場
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