背一篇英语作文需要多长时间80字【一】
一条绳子有多长呢？如果给你一条绳子，求它的长度，也许你会用你手中的直尺去量它。但可能会不准确，所以我们要用更精确的测量物去测量。
有一天，一位节目主持人向一位五金店老板要了一条绳子，并用尺子测量出大约为32厘米。为了求得更精确的答案，主持人去找他的好友——一位数学教授。教授带着他去了国家物理实验室，在去时的火车上，他们寻问了一位路人，这条绳子有多长？路人打量了一下说：“9英尺”。“没错，差不多”主持人说。
到了国家物理实验室，他们使用了“绳尺”去测量，所为的“绳尺”，其实是一个小机器，它会跟据一个小圆球去测量这条绳子有多长。最后测量的结为319毫米442微米。这个答案使我有点惊讶。“绳子”居然可以测量到微米，实在太厉害了。
回到酒店中，教授让主持人分别用直尺、绳子与地图测量轮，测量了在世界地图上黑撒到卢港的距离，果然这和教授说的一样，不同的测量方法真的会改变结果，结果分别是42厘米、47厘米与65厘米。教授说：“如果我们有更精确地测量方法，测出的长度可能会更长。因为你会深入任何角落和裂缝。所以，这绳子不是光滑的，它有很多褶皱的地方，所以这段绳子有多长，取决于测量的准确程度。”
最后，他们到了海滩，教授不停的让主持人画三角形，这些三角线组成了一个科赫雪花图形。只要图案不断被放大，就会有图形会被不断重复。所以教授认为这一条线也是一样的，所以得出的`结论是：绳子是无限长的！
他们用不同的方法测量出了不同的结果，越用精细的方法，绳子的长度就越准确。所以，我们在生活中要多加仔细，得到更多的知识。
背一篇英语作文需要多长时间80字【二】
我没有比尔·盖茨的头脑，没有巴菲特的运气，没有罗纳尔多的强健体魄，也没有史怀泽的荣誉光环，但我有坚定的信念，越挫越勇的执着，我始终坚信：这世界需要我。
一株小草渺小吗？不，野火烧不尽，春风吹过它会重生。一只蟑螂卑微吗？不，板鞋再厚，也打不顽强的“小强”。
这世界太大，有大就有小，有高就有矮，有美亦有丑，但万事万物都有它存在的价值，都是世界不可缺少的。我可以像央视一哥赵普一样奋斗不息。从兵哥到新闻哥，赵普从未停止奋斗，辗转在事业与自修的边缘，他坚持着，从不言弃。而我也正因为自己的目标打造着希望，我不怕苦，不言累，只要我坚持，总有一天我会在这个世界上振翅高飞，有所作为。我可以像方舟子一样秉持正义，维持社会的尊严与正义。方舟子能为打假六亲不认，不惧权威，只为寻得真相，还世界一片真实。我佩服他的勇气，我也会为正义说话，为这个世界的真相镇守着自己那片小小的营地。我可以为社会的和谐，学会退让，让出冰雪消融，让出春暖花开，让出海阔天空；我可以为/社会的温暖助人为乐，先人后己，关爱生命，守住内心的良知。
这世界需要我，我也会为了心中的信念，义无反顾，勇往直前。我有韩寒的率真，敢做敢言；我有白岩松的固执，执着不屈；我有约翰·库提斯的坚强，笑看人生；我有尼克·胡哲的乐观，积极向上。鲁迅曾言：“苟活者在淡红的色中会依稀看到微茫的'希望；真的猛士，将更奋然而前进。 ”我会像先生笔下的猛士一般，不屈不挠，向着前方的光明，带着坚毅的决心前进再前进。我不停地告诉自己：这世界需要我。
一湾溪流，蜿蜒回转中尚能荡出山鸣谷应的回响；一株寒梅，风刀霜剑中尚能吐露沁人心脾的幽香；一波巨澜，腾起跌落时尚能激起惊心动魄的雄壮。
我的不懈努力只为换取明日的成长。
待到自己“长大”之日，我必会回报世界。
泰戈尔说过：“只有流过的手指，才能弹奏出动人的旋律，只有经历地狱般的磨炼，才能练出创造天堂的力量。
”我相信这个世界是需要不停奋斗的人的，而我会在这条奋斗之路上披荆斩棘，开创出一片天地，向所有的人证明：这世界需要我。
背一篇英语作文需要多长时间80字【三】
For thousands of years， animals have trodden a slow path， their spirits together with the body。 But our human being\'s transportation is too fast。 The body moves but the soul is left behind。 We try to free ourselves in convenience， but we only imprison the soul。 Since we invented how to count hours， we do everything to short the time， short the deadline。 But the time saved can\'t be shorten。 Nowadays， we spend lots of time staying in front of a TV just changing the channels， while we have no time to talk with a good friend or play with our family。 We have plenty of time to search old news on the internet， while we hardly think about our life。 In the end， the only thing apparent is our loneliness。
Take your time， please。 Try to follow the natural steps and have your own clock。 Try to share your time with everybody you love， share your mind， your happiness and sadness。 Try to read the world we live in， do not only catch a quick glimpse at the society。
Someday， when we know how to spend every second in our life， we can then live our own life。
背一篇英语作文需要多长时间80字【四】
Time flies like an arrow before we realize it .It is known that nothing is more precious than time. The good old proverb "time is money" reminds us that time is valuable. When time goes by, it will never return. However, it is a pity that some people don't make full use of their time .They spend a lot of time in sleeping, chatting playing computer games or other unmeaning matters. . They don't realize that wasting time is actually equal to killing themselves. They always regret not having made great achievements. One of the reasons may be they do not make good use of time. Therefore, in order to be successful, they should first get into the habit of being on time. It’s a sign of cherishing time. Don't put off what can be done today until tomorrow. Being lazy will eventually lead to failure. Don't wait, because you don't know how long it will take when you put off your plan.
The more we are aware of the significance of this famous saying, the more benefits we will get in study or job.
背一篇英语作文需要多长时间80字【五】
Time flies like an arrow before we realize it .It is known that nothing is more precious than time. The good old proverb "time is money" reminds us that time is valuable. When time goes by, it will never return. However, it is a pity that some people don't make full use of their time .They spend a lot of time in sleeping, chatting, playing computer games or other unmeaning matters. . They don't realize that wasting time is actually equal to killing themselves. They always regret not having made great achievements. One of the reasons may be they do not make good use of time. Therefore, in order to be successful, they should first get into the habit of being on time. It’s a sign of cherishing time. Don't put off what can be done today until tomorrow. Being lazy will eventually lead to failure. Don't wait, because you don't know how long it will take when you put off your plan.
