What a good-for-nothing you are! You cannot take care of even such a trivial matter! 你真是废物,连这点事都不会干。
make use of waste material; convert wastes into useful materials; utilize waste things; 废物利用
throw the waste away; 扔掉废物
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)