1.Large and small enterprises differ in that the former usually involves conglomerates and the latter private individuals.
2.Both automobiles and bicycles offer a convenient means of public conveyance, with one of the marked differences between the two centered on pollution caused by the former.
3.Alcohol and tobacco are both highly addictive substances. However, unlike tobacco, which is known to cause cancer, studies indicate that alcohol does offer some health benefits when consumed in moderation.酒和烟都是很容易上瘾的东西。但是，研究显示，与公认为引起癌症的烟不同，酒如果适量饮用确实对健康有益。
4.One man's treasure is another man's junk.
5.AIDS is no longer one of the Top 10 American killers, but the same cannot be said for many countries.