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听力等级

教育学习   

2023-11-14   Pre-Intermediate
About the History of the English Language, Part One

Keywords:

More people are trying to learn English than any other language in the world.English is the language of political negotiations and international business.It has become the international language of sc...

尝试学习英语的人比世界上任何其他语言都多。英语是政治谈判和国际商务的语言。它已成为科学和医学的国际语言。国际条约规定客机飞行员必须说英语。英语是南美洲和欧洲大多数学校教授的主要外语。菲律宾和日本的学童从很小的时候就开始学习英语。英语是包括英...


2023-10-24   Video
Glycolysis

Keywords:

SPEAKER: The sweet, energetic glucose molecule is the energy source providing power for your living cells. Glucose, from the food you eat, is slowly broken down into two pyruvate molecule...

演讲者:甜,高能葡萄糖分子是提供能量的来源吗为您的活细胞提供能量。葡萄糖,来自食物你吃,是慢慢的分为两部分丙酮酸分子,按顺序提取能量称为酶反应糖酵解。糖酵解途径需要能量开始,交付通过化学燃料ATP。主要来源细胞中ATP的含量是线粒体细胞器。...


2023-10-20   Video
Pyruvate Dehydrogenase

Keywords:

MALE: The product of glycolysis. The pyruvate molecule is the source of carbon and electrons for aerobic respiration reactions inside your mitochondria. Pyruvate enters pores on the mit...

男性:糖酵解的产物。丙酮酸分子是碳和电子的来源有氧运动呼吸反应在线粒体内。丙酮酸进入毛孔线粒体膜,并被运输进入内部。连接丙酮酸的反应有氧呼吸由以下人员执行巨大的蛋白质复合体制作多份副本三种类型的酶。第一种酶催化脱羧反应,改造三丙酮酸碳转化为...


2023-10-16   Video
ATP Synthesis

Keywords:

All life on Earth depends on this tiny energetic molecule, adenosine triphosphate or ATP. ATP drives biochemical activity inside your living cells and is a key building block of DNA and RN...

地球上的所有生命都依赖于这个微小的高能分子,三磷酸腺苷或ATP。ATP驱动生化活动在你的活细胞内是一座重要建筑DNA和RNA的阻断。生成ATP你的活细胞是线粒体,电化学电池转换能量从你吃的食物以及空气中的氧气你吸入ATP。那么,你在哪里AT...


2023-09-26   Video
Electron Transport Chain

Keywords:

SPEAKER: The center of activity that brings your cells to life is found inside the dynamic mitochondria organelle. The inner mitochondrial membrane is coated with enzymes that catalyze th...

演讲者:活动中心 让您的细胞充满活力 位于 Dynamic 线粒体细胞器。 线粒体内 膜是 包被的酶 催化化学反应 呼吸, 工作 in sequence 生成 电子传递链。 第一步 电子传递链...


2023-09-22   Video
Biology of SARS-CoV-2 - Detection

Keywords:

SPEAKER: There are several ways to test whether someone has been infected with SARS COV-2. Some tests can detect if you have an active infection or an infection that is happening right ...

演讲者:有几种方法 来测试某人是否具有 感染了 SARS COV-2。 某些测试可以 检测您是否患有 活动性感染 或感染 正在发生。 其他人可以检测您是否 过去曾感染 并恢复了。 要确定您是...


2023-09-10   Video
Biology of SARS-CoV-2 - Infection

Keywords:

SPEAKER: This is the virus SARS-CoV-2. Its name stands for Severe Acute Respiratory Syndrome Coronavirus 2. You may have heard it called just the coronavirus, or COVID-19. Coronaviru...

演讲者:这是 病毒 SARS-CoV-2。 它的名字代表 Severe 急性呼吸系统综合症 冠状病毒 2. 您可能听说过 它只叫 冠状病毒或 COVID-19。 冠状病毒是 其实是一个家庭 的病毒...


2023-09-09   Pre-Intermediate
The Short Story 'After Twenty Years,' by O.Henry

Keywords:

The cop moved along the street, looking strong and important. This was the way he always moved. He was not thinking of how he looked. There were few people on the street to see him. It was only about ...

警察沿着街道移动,看起来强壮而重要。这是他一贯的动作方式。他没有在想自己的外表。街上很少有人看到他。晚上只有十点左右,但很冷。有一阵风,里面下着点雨。 他边走边停在门口,试探每一扇门,以确保它晚上是关着的。他时不时地转过身来,上下打量着街...


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