The us of variou type of sewer pipe is an attract altern for the instal of fiber optic cabl in the complex infrastructur of cities.
基础设施复杂


,利用不同类型
下水管
安装光缆是一种具有吸

方法。
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For a population so reliant on the income that tourism brings, eco lodges like Chobe are vital in forging a path that can maintain and even boost visit numbers, without damaging the very ecosystem that makes Botswana such an attractive destination.
对于如此依赖旅游业带来收入的地区来说,像乔贝这样的生态旅舍,对于打造一条能够维持甚至增加游客数量的道路至关重要,与此同时,不要破坏使博茨瓦纳具有吸引力的生态系统。
洲 
听力