Even birders who opt for a field bag, binoculars and other birding supplies can find suitable options for low budgets.
甚至想要拥有自己的野营包、双筒望远镜和其他观鸟设备的观鸟者也能找到价格较低、合适的选择。
Observing many different species of birds may require long hikes and walks over uneven and challenging terrain while carrying a field bag with guides, binoculars, scopes and other equipment.
要观察到更多种鸟儿，你可能需要长途跋涉，走过崎岖不平的难走的地势，还要背负装着观鸟指南、双筒望远镜、单筒望远镜和其他器材的野营包。
At present, bag filter technology used in the field of diesel bus exhaust gas particulates control is stepping into a practical application stage.
目前，袋滤技术在柴油公交车尾气微粒排放控制领域的应用已接近实用化阶段。
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