"his rattlebrained crackpot ideas" "how rattlepated I am! I've forgotten what I came for"
"an absent stare" "an absentminded professor" "the scatty glancing quality of a hyperactive but unfocused intelligence"
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)