"an ingenuous admission of responsibility"
"an artless manner" "artless elegance"
"an artless translation"
The work in which I engaged is generally considered..as the proper toil of artless industry.
A shadowy lifesartless, joyless, loveless.
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)