蜜芽传媒 Learning English - 蜜芽传媒 Q&A “你问我答”: 近义词解析:concentrate, assemble, converge and focus - 蜜芽传媒 Sounds

蜜芽传媒 Learning English - 蜜芽传媒 Q&A “你问我答”: 近义词解析:concentrate, assemble, converge and focus - 蜜芽传媒 Sounds
蜜芽传媒 Q&A “你问我答”: 近义词解析:concentrate, assemble, converge and focus
When do people concentrate?