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| Subject | English | Russian |
| idiom. | be a matter of debate | бабушка надвое сказала (Whether or not the tax cuts benefit the poor is still a matter of debate. george serebryakov) |
| gen. | be a matter of scientific debate | вызывать споры в научных кругах (clck.ru dimock) |
| gen. | be a matter of scientific debate | быть предметом научных споров (clck.ru dimock) |