这飞行器划过昏暗的夜空，吓到了当地居民；空中交通管理者也感到惊恐，立即关闭了繁忙的杭州机场，并将城市的空域锁定了一个多小时。

Gliding across the dusky sky, the craft startled locals and frightened air-traffic controllers, who promptly closed Hangzhou's busy airport and locked down the city's airspace for more than an hour.

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飞机在单一路线上来回飞行，通常降落在宁静又偏僻的机场，而不是繁忙的交通枢纽。

Aeroplanes flew back and forth along a single route, often between quiet, out-of-the-way airports, rather than using busy hubs.

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这款扩音器还在机场等一些繁忙的公共交通系统区域进行了测试。

The megaphone is also being trial led in airports and areas with busy public transport systems.

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