One possible version:As is known to us all， smoking does harm to not only smokers themselves but also people around Smoking can lead to various diseases， like heart trouble， cancer and other The WHO says diseases related to smoking kill at least two million people each Though it is not easy for the smokers to give up smoking， I hope they should try to stop smoking for the health of themselves and And our government should make laws which ban smoking in public Since smoking is so harmful， I hope all teenagers would not try to start to smoke and form healthy 略
To study high-altitude region of the earth different times the volume of flue-cured tobacco production and the internal composition of tobacco leaf， earth of best topdressing time， high-altitude in Yunnan Baoshan area in the The results showed that: 40 days after transplanting earth has a better deal with agronomic traits and economic traits and chemical composition of targets， 50 days after transplanting earth to deal with the second， and 30 days after transplanting earth to deal with agronomic and economic characters of the margin is not on earth to deal high-altitude regions in the earth 40 days after transplanting， and growing tobacco is better， at the same time have a high economic efficiency and quality suitable for the 累死我了。。
