"he uses drugs as a psychological crutch"
Some walking with the aid of canes, a few on crutches.
Two fools that crutch their feeble sense on verse.
Old crippled buildings..crutched up with posts and logs.
牛津高阶第八版
美国韦氏词典
Dictionary.com
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维基百科 (自由的百科全书)