duty 可以作为可数名词,也可以做不可数名词
duty是可数名词么求大神帮助责任;义务;本分[C][U] It is our duty to defend our c
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it is our duty to do
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句型转换To protect wild animals is our duty.(改为同义句)___ our duty
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【NOISE 语法】It is our duty to protect them from being noisied.