careful and careless are as different as fire and water. but strangely, many scientists have both these qualities, that is, they are both careful and careless. newton, the well known english scientist, is such a person.

　　once newton invited a friend to dinner at home. when they were ready to eat, newton left to get a bottle of wine. but after his friend had waited for a long time, newton still didn't come back. finally his friend found newton in his lab.

　　the reason was that when newton was going to get the bottle of wine, he suddenly had a new idea for the experiment he was doing, so he completely forgot his friend and the dinner. there was another time when newton was leading a horse up a mountain holding the rein in his hand.

　　while he was walking, he kept thinking of problems he had met in his studies. when he got to the top of the mountain, he found that the rein was not in his hand and the horse was gone.

　　many scientists are careless about how they live. this is because they are too careful in their studies.

　　英語四級寫作及經典范文:手機影響學習嗎(Do Mobiles Distract Study)

　　wherever you are, you can see many people equipped with mobile phones. it seems that the world becomes smaller nowadays. you could be found wherever you are so long as you take the mobile phone with you. and mobile phones are also becoming a new scene on campus.

　　students think it is extremely convenient for them to communicate with the outside world by using mobile phones, especially when they are hunting for jobs, so they call it an essential investment.

　　education experts analyze the entry of mobile phones into campus as an indication of social progress. and mobile phones have been considered advanced for its attractive functions. the youth of today send messages, surf on the net, listen to music and even take photos by using their mobile phones. to some extent, it reflects that college students are more and more involved in this modern society, rather than pedants in the “ivory tower”.

　　as a coin has two sides, the mobile phone, while providing convenience, causes trouble too. in classrooms, the untimely ringing interrupts lectures and destroys the atmosphere of study, so it prompts many complaints. and the mobile phone users themselves also suffer.

　　therefore, we need to think more about how to integrate mobile phones properly into our lives.