求翻译：4．在对外汉语教师培训方面，基地应能承担专、兼职对外汉语教师的培训任务；发挥对对外汉语教师进行教学观摩和交流、进修和研讨方面的中心作用；接受境外汉语教师专业培训和研修的任务；加强硕士点和博士点的建设，培养对外汉语教学的高层次专门人才。是什么意思？

4. In the foreign language teacher training, the base should be able to take special, part-time foreign language teacher training mission; play for foreign language teachers to observe teaching and communication, training and seminars in the central role; received professional training and foreign l

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