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.
There are air-locked rooms here for issuing "challenges" to people with every conceivable severe allergy.
那里有完全密闭的房间，以供你能想到的所有最严重的过敏病人使用。
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Even when the car is off and locked, these fans whir around, so when you step back into it you don't need to crank up the power-hungry air conditioning.