Clouds and rain in Florida forced NASA to land the shuttle at a backup landing site.
弗罗里达连日的阴雨连绵不得不让国家航空和宇宙航行局启用这个备用降落场。
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Onboard battery-powered computer controls allow the kites to land themselves during extreme weather conditions, or if the tether is severed, and multiple motors provide a backup if one motor fails.
In addition, the land transportation banding techniques in a professional team of storage and backup, which greatly increase the safety factors of carriage of goods.