1. Topical or not , it has given me community that I never had before.
不管是不是肤浅，网络至少给了我前所未有的共享体验。
2. Smoking is thought to increase the risk of an ectopic pregnancy by up to four times.
吸烟可能增加胎儿畸形的概率多大四倍。
3. We live in communities which require cooperation , and it would be utopian to expect all the necessary cooperation to result from spontaneous impulse.
我们生活的社会需要合作，而寄希望于自发的冲动能产生所有必要的合作是不现实的。
4. The group 's economic geography is as spectacular as its topography.
这个组织的经济地理与其地形一样壮观。
