"fleet of foot" "the fleet scurrying of squirrels" "a swift current" "swift flight of an arrow" "a swift runner"
The horses dropped from their swift trot to an amble.
The time was..so swift that it seemed to flow beyond his range of being.
牛津高階第八版
美國韋氏詞典
Dictionary.com
Free Dictionary
維基百科 (自由的百科全書)