正文：
A cell is the basic unit of life.
細(xì)胞是生命的基本單位野瘦。
The cell is the smallest structure that can live and reproduce.
細(xì)胞是能夠生存和繁殖的最小的結(jié)構(gòu)。
Cells grow and develop, reproduce and interact with the environment.
細(xì)胞生長(zhǎng)、發(fā)育、繁殖并與環(huán)境相互作用册舞。
Photosynthesis is one of the most important biological processes.
光合作用是最重要的生物過程之一盐捷。
It allows plants to capture and use light as an energy source.
它允許植物捕捉和利用光作為能源。
Photosynthesis is the process of converting light energy into chemical energy.
光合作用是把光能轉(zhuǎn)化為化學(xué)能的過程讶坯。
A virus is a small biological structure that attacks and enters cells.
病毒是一種攻擊并進(jìn)入細(xì)胞的小型生物結(jié)構(gòu)。
Once inside a cell, a virus reproduces and makes many copies of itself.
一旦進(jìn)入細(xì)胞竟坛，病毒就會(huì)自我復(fù)制并復(fù)制很多次闽巩。
Some diseases such as influenza are viruses.
有些疾病如流感是病毒。
Bacteria are one-celled forms of life that are all around us.
細(xì)菌是生活在我們周圍的單細(xì)胞生物担汤。
Although they have a single-cell structure, they are very important.
雖然它們是單細(xì)胞結(jié)構(gòu)涎跨，但它們非常重要。
Many bacteria are inside us and help us digest our food.
我們體內(nèi)有許多細(xì)菌崭歧，它們幫助我們消化食物隅很。
DNA is a complex molecule that stores information and can make copies of itself.
DNA 是一種復(fù)雜的分子，可以存儲(chǔ)信息并可以復(fù)制自身率碾。
Nearly every cell in a person's body has the same DNA.
人體內(nèi)幾乎每個(gè)細(xì)胞都有相同的 DNA叔营。
The information stored in DNA tells cells what to do, and is necessary for reproduction.
儲(chǔ)存在DNA中的信息告訴細(xì)胞該做什么，這是繁殖所必需的所宰。
Many bacteria are inside us and help us digest our food.
許多細(xì)菌在我們體內(nèi)幫助我們消化食物绒尊。
The influenza virus spread through the air when people cough or sneeze.
當(dāng)人們咳嗽或打噴嚏時(shí)，流感病毒會(huì)通過空氣傳播仔粥。
cells are often called the building blocks of life 細(xì)胞通常被稱為生命的基石
there are billions of bacteria in our intestines我們的腸道里有數(shù)十億的細(xì)菌
some bacteria are very dangerous and can caouse disease有些細(xì)菌非常危險(xiǎn)婴谱，會(huì)引起疾病
