the sun rises in the east and sets in the west, which is caused by the rotation of the earth as you all know. but have you ever thought of the effect of the earths rotation on man and can you imagine what would happen if the earth stopped rotating?
the radius of the earth is about 6,370 kilometres. it takes the earth 24 hours to rotate once. objects on the earths equator move with the earth at a speed of 460 metres per second, and the air close to the earths surface turns at the same speed. if the earth stopped rotating suddenly, the air would keep flowing eastward at a speed of 460 metres per second. the wind would be fourteen times as powerful as a hurricane. at the same time sea water would rush eastward at a speed of several hundred metres per second, which might do damages much greater than a seaquake would do. obviously, men could hardly stand such a catastrophe.
even if such a catastrophe would not happen, there would be a great temperature difference on the two hemispheres of the earth, and the four seasons of the year would no longer occur because a day and a night would be as long as a whole year instead of 24 hours. all this would greatly affect the life of human beings, imals and plants and that would cause worse results than anything imaginable.
在家中,我时常会被拿来比较,而我总是输的那一个。有时我会躲在棉被里哭泣,有时也会跟朋友抱怨,但妈妈总是告诉我,抱怨不会使事情变得更好,只会使自己 的想法更悲观;而哭也是疏压情绪的一种,但哭完必须把眼泪擦乾,继续向前迈进,可以生气,但要争气。别人认为我做不到,我就要证明给他们看,化悲愤为力 量,找到属于自己的梦想。
放弃者不会胜利,胜利者永不放弃,如果要改变命运,努力就要从现在做起,也许过程中很艰难,但若能勇于尝试,便会发现世界无限宽广。
人的一生可以平平凡凡,也可以很精彩且充实,这一生是由自己缔造。我必须完成梦想,不让自己再烦恼,虽然行动不一定能成功,但坐而不行绝无成功可言,我希望我能做到,不让这一切沦为空谈。
我要解决烦恼,并非消灭烦恼,我需先学会如何妥善运用时间。光阴稍纵即逝,我必须要先充实内涵,努力的过程中,虽会些挫折,但失败就是离成功不远,有了目 标很好,也要努力迈进。世界上最可怜的人莫过于拥有一双眼睛,却没有愿景,我定要去实践,解决烦恼,创下属于自己的故事。
今天,班主任因有紧急事而暂时离开了教室,班上顿时吵闹起来,身为班长的我便要维持秩序。
只见小华和小巧在玩追逐,小巧不小心跌到了,膝盖受伤了,副班长立刻带她去办公室擦药。整间课室乱成一团,小康和志明在课室里丢纸飞机,他们玩个不亦乐乎,小安和宠宠则在座位上高谈阔论就像“广播电台”一样。小白,玲玲和天佑则在黑板上乱涂鸦,把黑板画非常肮脏。
我知道自己的能力有限,控制不了这混乱的情况。这时,我想到了一个好办法,我大喊一声“老师来了”!同学们收拾好课室纷纷坐回原位,班上暂时安静了,他们伸长了脖子向门外望去,同学们看见没人,就再次玩玩了起来。
这时,班主任回来了,同学们马上坐回原位继续上课。我心想我终于“功成身退”了。
前天,妈妈,外公和外婆给我买了一只烧鸡,我垂涎三尺,恨不得一口把这盘烧鸡吃掉。
正当我吃得津津有味时,突然,感觉到嗓子很难受,让妈妈一看,原来我的嗓子卡了一块小骨头。
我很难受,自己想咽下去 ,可是不行,想吐出来,也不行,我急得快要哭了。
外公说:“快喝点醋,醋能把骨头软化。”我喝了一口醋,好酸好酸,可是没用,我更难受了,我说不行不行,他们只好想别的办法了。
外婆灵机一动,说:“吃馒头能把刺咽下去。”我急忙吃了一口馒头,又吃了一口,可是还不行,怎么办呢?我使劲发出“咔咔”的声音,希望通过振动把骨头吐出来,我觉得嗓子没那么难受了,我又使劲儿“咔”了几声,鸡骨头终于吐出来了。我们都松了一口气。
通过这件事我明白了一个道理:吃东西一定要细嚼慢咽,不论干什么事,只要认真,坚持不懈就一定能够成功。
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