post·haste /ˈpostˈhest/
特快(a.)特快的
Post·haste n. Haste or speed in traveling, like that of a post or courier.
Post·haste, adv. With speed or expedition; as, he traveled posthaste; to send posthaste.
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post-haste
adv : as fast as possible; with all possible haste; "send it to me
post-haste"