首页-日语 - 地盘 - 记录 - 日志 - 下载 - 查词 - 翻译 - 排行
F8键(暂停/播放)| F9键(重复此句)| 左键或ALT+Z(上一句)| 右键或ALT+X(下一句)
听写窗口
译文窗口
注释窗口

您没有登录,系统不能保存您的听写记录和听写错词,点击此处登录

听写提交之后可查看原文
This is Scientific American's 60-second Science, I'm Christopher Intagliata.
There's a scene in the Matrix where the character Cypher talks about the illusory experience of eating a fine meal:
"And then he eats from the steak and says:"
"I know this steak doesn't exist.
I know that when I put it in my mouth, the Matrix is telling my brain that it is juicy and delicious."
"It tastes so good, I prefer this virtual reality to the cruelty of the world."
Ignorance is bliss.
Recounting that scene is Carlos Ribeiro, a neuroscientist at the Champalimaud Foundation in Portugal.
He has a special interest in that scene because he has essentially recreated that phenomenon―in fruit flies.
"This is exactly what we're doing to the flies."
Here's how it works.
He and his team raised genetically engineered flies with taste neurons that can be turned on and off with red and green light.
That kind of process is known as optogenetics.
His team fed the flies bland food, which they understandably disliked.
But then the researchers bathed the flies in light to turn on sweetness-perceiving neurons,
and the flies gobbled up the food, which to them now tasted sweet.
The team was also able to do the same with bitter neurons.
The flies got bitter food, which they avoided―
but the scientists then turned off the bitter neurons, and all of a sudden the flies changed their minds.
"And so we have used this to create completely virtual taste realities for our flies."
这里是科学美国人――60秒科学系列,我是克里斯托弗・因塔格里塔。
电影《黑客帝国》中有一个场景,片中角色塞弗谈论吃美味佳肴的虚幻体验:
“然后他吃了牛排并说:”
“我知道这块牛排并不存在。
我知道当我把它放进嘴里时,矩阵告诉我的大脑它多汁且美味。”
“味道真是太棒了,比起残酷的世界,我更喜欢这种虚拟现实。”
无知是福。
描述这一场景的是葡萄牙查姆帕利莫德基金会的神经学家卡洛斯・里贝罗。
他对那个场景特别感兴趣,因为他基本上在果蝇身上重现了那个现象。“
这正是我们对果蝇所做的事。”
以下是具体操作方式。
他和团队饲养转基因果蝇,使其神经元可以在红绿光下开关。
这种过程被称为“光遗传学”。
他的团队给果蝇喂食清淡食物,它们当然不喜欢这种食物。
但之后,研究人员用光照射果蝇,打开其感知甜味的神经元,
然后果蝇便狼吞虎咽地吞下食物,现在对它们来说这种食物是甜的。
团队对苦味神经元进行了同样的操作。
果蝇得到了它们会避开的苦味食物,
但在科学家关闭了苦味神经元后,果蝇马上改变了主意。
“因此,我们用这种方法为果蝇创造了完全虚拟的味觉现实。”
暂无注释
听写注意
1.为防止灌水听写至少要输入超过10个单词方可提交同时听写内容不能粘贴;
2.标点符号不用填写,听写比对会忽略掉标点符号;
3.单词与单词之间要留有空格,同时数字(年月或金额)请用阿拉伯数字。
可友留言
加载中...
我来说2句
抱歉,您需要先登录后才能留言
谁正在听写
得分最高
最新听写
热门听写