【精华】英语作文4篇

在现实生活或工作学习中，大家都写过作文，肯定对各类作文都很熟悉吧，通过作文可以把我们那些零零散散的'思想，聚集在一块。那么你有了解过作文吗？下面是小编精心整理的英语作文4篇，仅供参考，希望能够帮助到大家。

英语作文 篇1

cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. enzyme systems of mammals and birds are most efficient only within a narrow range around 37c;a departure of a few degrees from this value seriously impairs their functioning. even though cells can survive wider fluctuations the integrated actions of bodily systems are impaired. other animals have a wider tolerance for changes of bodily temperature.

for centuries it has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. ways of characterizing the difference have become more accurate and meaningful over time, but popular terminology still reflects the old division into "warm-blooded" and "cold-blooded" species; warm-blooded included mammals and birds whereas all other creatures were considered cold-blooded. as more species were studied, it became evident that this classification was inadequate. a fence lizard or a desert iguana-each cold-blooded----usually has a body temperature only a degree or two below that of humans and so is not cold. therefore the net distinction was made between animals that maintain a constant body temperature, called home0therms, and those whose body temperature varies with their environments, called poikilotherms. but this classification also proved inadequate, because among mammals there are many that vary their body temperatures during hibernation. furthermore, many invertebrates that live in the depths of the ocean never eperience change in the depths of the ocean never eperience change in the chill of the deep water, and their body temperatures remain constant.

英语作文 篇2

My favorite is freedom that I can do everything for mine without thinking!

“We do not stop playing because we are old;we grow old because we stop playing.”There are secret to staying young,being happy and achieving the life,it’s my want.

I don’t think anything,but reality is the opposite for my I play game,I need consider that if it would spend my times for my work,and when I do anything I was very trouble to choice if that can I do?So,I don’t want this life and I need a new behavior to do anything without I can play with work together to do anything,as long as I do not disturb others,and do not break the regular life.

And for my thing that I do,I wouldn’t regret for it,because I just regret what I not do,as the elder usually don’t have regrets for what we did,but rather for things we did not only people who fear death are those with regrets.”

英语作文 篇3

Hold to Your Dreams

Everyone has his dreams, but not all these dreams can come true. People give up their dreams for this or that reason. Those whose dreams become true have at least one thing in common, that is, they always hold fast to their dreams.

Marie Curie, a famous scientist, has set a good example. In 1898, Marie found a new element in the pitchblende. In order to prove her discovery, she must get it and show it to the world. Then to get the new element became her dream and goal of her life. After four years' hard work and refinement of tons of pitchblende, Marie and her husband at last saw the dim blue light of the new element -- radium. Her dream had come true. There are many other examples. Just around us, for instance, the athletes who gain the gold medals, the artists who are popular with the public, and even the students who enter tile university after years of hard study and preparation, are all dream-holders.

Hold fast to your dreams, no matter how big or small they are. The path to dreams may not be smooth and wide, even some sacrifices are needed, but hold on to the end, you, still find there is no greater happiness than making your dream come true.

英语作文 篇4

My family photo

I have a small but warm family. There are three people in my family : my father ,my mother and I.

My father is a teacher. He likes reading and so do I . He always buys lots of books for me a result, I learnt a lot from these books my opinion, he is a good teacher. He is very kind to his students, so they like him very much.

My mother is a doctor, who saves people’s life. She’s busy in working. Sometimes she needs to work all night. She always says to me that life is for more important than any other things. Form the bottom of my heart, she is a real heroine.

My parents love me very much, they teach me to be a kind girl and to help people who are in trouble.

I love my parents just them love me!

My family photo