人體中的每一個細胞，都堪稱大自然的藝術品，它們的存在方式讓人們嘆為觀止。
在人體中，無時無刻不在發生著比任何科幻大片都要精彩的「大戰」，這就是我們體內細胞與病毒間的生死之戰。細胞和病毒是那樣的微小、無聲無息，但它們之間的大戰不僅精彩無限，而且對於人類的生存更是發揮著至關重要的作用。
病毒是如何進入我們體內的，細胞又是如何殺死這些病毒的呢？今天，小賽就與大家分享一個趣味十足的動畫科普視頻《細胞與病毒之戰》，一起揭開問題的謎底，了解我們體內的微觀世界！
不想看視頻的同學可以直接跳過看下面的圖文解說！
You're in line at the grocery store when, uh oh, someone sneezes on you. The cold virus is sucked inside your lungs and lands on a cell on your airway lining.
你在超市裡排隊，哦，不妙，有個人朝你打了個噴嚏。感冒病毒被吸到了你的肺裡，然後降落在你氣管壁上的一個細胞。
Every living thing on Earth is made of cells, from the smallest one-celled bacteria to the giant blue whale to you. Each cell in your body is surrounded by a cell membrane, a thick flexible layer made of fats and proteins, that surrounds and protects the inner components. It's semipermeable, meaning that it lets some thing pass in and out but blocks others. The cell membrane is covered with tiny projections. They all have functions, like helping cells adhere to their neighbors or binding to nutrients the cell will need.
地球上所有的生命都是由細胞組成的，從最小的單細胞細菌，到巨大的藍鯨，到你。
你身體裡的每一個細胞都是被細胞膜所包起來，那是由脂肪和蛋白質組成的一層即厚又軟的物質，包圍並保護著細胞內部。
細胞具有半滲透性，意味著它讓有些東西自由進出，但阻擋其它的東西。
細胞膜上有很多突出的部分。它們都有用處的，比如幫助細胞吸附住臨近的細胞，或幫細胞連結上營養物質。
Animal and plant cells have cell membranes. Only plant cells have a cell wall, which is made of rigid cellulose that gives the plant structure. The virus cell that was sneezed into your lungs is sneaky. Pretending to be a friend, it attaches to a projection on the cell membrane, and the cell brings it through the cell membrane and inside. When the virus gets through, the cell recognizes its mistake. An enemy is inside!
動物細胞和植物細胞都有細胞膜。但是只有植物細胞有細胞壁，當中堅硬的纖維素給植物製造了他的結構。
被打噴嚏進你肺裡的病毒體是很狡猾的。它假裝是一個朋友，連到細胞膜上的一個突出部分，然後細胞讓它穿過細胞膜進來。
當病毒在裡面了以後，細胞認識到它犯的錯誤。敵人到裡面來了！
Special enzymes arrive at the scene and chop the virus to pieces. They then send one of the pieces back through the cell membrane, where the cell displays it to warn neighboring cells about the invader. A nearby cell sees the warning and immediately goes into action.It needs to make antibodies, proteins that will attack and kill the invading virus.
特殊的酶趕到現場，把病毒切成數塊。之後它們把其中的一塊放到細胞膜外面，這樣細胞就可以警示它旁邊的細胞：有入侵者。旁邊一個細胞看到了這個警示，立刻開始行動。它需要製造叫做抗體的、會攻擊並殺掉入侵病毒的一種蛋白質。
This process starts in the nucleus. The nucleus contains our DNA, the blueprint that tells our cells how to make everything our bodies need to function. A certain section of our DNA contains instructions that tell our cells how to make antibodies. Enzymes in the nucleus find the right section of DNA, then create a copy of these instructions, called messenger RNA.
整個製造流程從細胞核內開始。細胞核裝有我們的DNA，那是一幅告訴我們細胞怎麼製造我們身體所需的一切東西的藍圖。我們DNA的一部分有指示來告訴我們的細胞怎麼製造抗體。
細胞核中的酶找到正確的DNA部分，再製造這些指令的備份，叫做信使RNA。
The messenger RNA leaves the nucleus to carry out its orders. The messenger RNA travels to a ribosome. There can be as many as 10 million ribosomes in a human cell, all studded along a ribbon-like structure called the endoplasmic reticulum. This ribosome reads the instructions from the nucleus. It takes amino acids and links them together one by one creating an antibody protein that will go fight the virus. But before it can do that, the antibody needs to leave the cell. The antibody heads to the golgi apparatus. Here, it's packed up for delivery outside the cell. Enclosed in a bubble made of the same material as the cell membrane, the golgi apparatus also gives the antibody directions, telling it how to get to the edge of the cell. When it gets there, the bubble surrounding the antibody fuses to the cell membrane. The cell ejects the antibody, and it heads out to track down the virus.The leftover bubble will be broken down by the cell's lysosomes and its pieces recycled over and over again.
信使RNA離開細胞核去執行它的命令。信使RNA到了一個核糖體。在一個人體細胞裡有一千萬個核糖體，都集中在一個叫做內質網的結構上。
這個核糖體解讀來自細胞核的指示。它把胺基酸一個接一個串起來，製造成一個會攻擊病毒的抗體蛋白質。
但在那之前，抗體必須得離開細胞。抗體去往高爾基體。在這裡，它會被包裝起來向細胞外運輸，包在一個由細胞膜物質組成的泡泡裡。
高爾基體也會給抗體指示，告訴它怎麼去細胞的邊緣。當它到了那裡，包著抗體的泡泡融入細胞膜。細胞射出抗體，然後抗體去找那病毒。
剩下的泡泡會被細胞的溶體而分解，它的碎片被重複地回收利用。
Where did the cell get the energy to do all this? That's the roll of the mitochondria. To make energy, the mitochondria takes oxygen, this is the only reason we breathe it, and adds electrons from the food we eat to make water molecules. That process also creates a high energy molecule, called ATP which the cell uses to power all of its parts.
細胞在哪裡找來能量去做這些事情?那是線粒體的功能。為了製造能量，線粒體吸進氧氣，這是我們需要氧氣的唯一原因，然後它加入從我們吃的食物中來的電子去製造水分子。這個過程同時製造出一個高能量分子，叫做三磷酸腺苷，為細胞供給能量所用。
Plant cells make energy a different way. They have chloroplasts that combine carbon dioxide and water with light energy from the sun to create oxygen and sugar, a form of chemical energy. All the parts of a cell have to work together to keep things running smoothly, and all the cells of your body have to work together to keep you running smoothly. That's a whole lot of cells. Scientists think there are about 50-60 trillion of them.
植物細胞通過不同的形式製造能量。它們有葉綠體，能結合二氧化碳及水，藉助從太陽得來的光能產生氧氣及糖，為化學能的一種形式。
細胞內的所有零件都必須合作，讓一切運作順利，你體內所有的細胞也必須一起工作，使你一切正常。那可是一大堆的細胞，科學家認為大約有50-60萬億個之多。
你沒理由放棄自己的健康，因為你身體內的每一個細胞都在為了你的健康、你的生命奮鬥著！