台湾籍旅美老师今天交给我们的句子是：

Located in Brazil is the Javari Reserve, the largest concentration of uncontacted tribes in the world. According to satellite imagery, at least eight tribes exist, with as many as 14 potentially existing.
位于巴西的查瓦利保护区，是世界上最大且与外界无联系的原始部落族群集中地。从卫星图看来，那里至少有8个部落存在，甚至还有可能多达14个部落。

学习重点：

1.reserve 保留
reserve (v.) 保留
reservation (n.) 保留、意见
preserve (v.) 保存
preservation (n.) 保护
conserve (v.) 保存
conservation (n.) 保存

2.tribe 部落
tribe (n.) 部落

3.potentially 潜在地
potentially (adv.) 潜在地
potential (n.) 潜力