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我断言这条曲线，界定了另一个可定向的曲面。
Well, I claim this curve actually bounds another surface that is orientable.
youdao
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他断言，有效的管理没有捷径可走。
He maintains that there are no short cuts to effective management.
youdao
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他断言，有效的管理没有捷径可走。
He maintains that there are no short cuts to effective management.
youdao