The US Secretary of State John Kerry says he has told China its approach to dealing with North Korea is not working. Mr. Kerry said China had been given space to work with Pyongyang, but this approach had failed. "__________." 美国国务卿约翰.克里称他已经告诉中国,他们处理朝鲜问题的举措并不奏效.克里表示中国给予平壤空间与之合作,但失败了."_____________."