to defy frustration optimistically
to defy frustration optimistically 乐观地挑战失败 to render/offer/give sb a comparatively systematic and comprehensive knowledge and various skills 带来相对系统和全面的了...
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to defy frustration optimistically
乐观地面对挫折
以上为机器翻译结果，长、整句建议使用 人工翻译 。