疾速 meaning in English

haste
velocity

I thought i was going down greatly in his estimation .
我想他对我的估价正在疾速地跌落。
How ostriches could bear to run so hard in this heat i never succeed in understanding .
驼鸟在这样干燥炎热的地带为什么能疾速长跑，我永远也理解不了。
Google believes in instant gratification
Google相信疾速的快感。
I hasten to respond to your invitation
我会疾速回答你的约请。
Like a last minute light speed train
好似疾速的末班车

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