1. Vast tracts of the country are wild and undeveloped. 这个国家有大片荒芜未开发的土地。
2. Great tracts of lowland country deforested by logging, fire, or both have become ideal feeding grounds of deer. 在低地国家大片的森林被砍伐、遭受火灾或两者皆有，成为鹿群理想的觅食地。
3. When you read about 'em in tracts they're always very religious. 当你在传单上读到他们的时候，他们总是非常虔诚。
4. He sought Ben Rogers, and found him visiting the poor with a basket of tracts. 他找到了本·罗杰斯，发现他带着一篮子布道的小册子去拜访穷人。
5. The range through these states is mediated by the arousal system, a network of tracts converging from sensory systems to integrating centers in the brain stem. 这些状态的变化是以激发系统作为媒介完成的，而所谓激发系统，是指从各个感觉系统汇聚到位于脑干中整合中心的一个网络。
