俄语
-ив〔形〕坐得住板凳的；埋头苦干的. ～ учени́к勤奋的学生；坐得住的学生. Он ～ив в труде́, заня́тиях. 他在劳动和学习中埋头肯干。
уси́дчиво.
уси́дчивость〔阴〕.
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