英语好的同学帮忙做做啊……IV、 Translate English into Chinese2.Just as exe

2.Just as exercise strengthens the heart and lung,bones and muscles,it may also power up the brain.
锻炼身体能增强心肺,骨骼和肌肉,同样也有可能对脑力起到提升的作用.
3.I would like to go back to school so that I can become economically independent,support myself,and if need be,support those dependent upon me.
我想回到学校（继续学业）这样我才能在经济上独立,自给自足,并且在需要的时候照顾到那些依靠我的人.
4.But the fact is that the world is facing the prospect of water shortages caused by population growth,uneven supplies of water,pollution,and other factors.
但事实上全世界都面临着由人口增长、供需失衡、污染和其他因素引起的水荒.
5.Water shortages could also lead to international conflict as countries compete for limited water resources.
水荒有可能会导致国际上的冲突,由于国与国之间会为有限的水资源相互竞争.