The chief U.S. envoy to the talks, U.S. Assistant Secretary of State Christopher Hill, said Wednesday that Washington has done all it can.

　　"We're confident the Chinese will work very hard to get the DPRK to sign onto the draft agreement," Hill said, referring to the North by the initials of its formal name. Hill said he didn't know how long the talks would last, but added: "I'm a patient person.

　　Protracted表示“拖延的，延长的”，其动词protract表示“拖长，延长，伸出，突出，用尺绘制”，例如：protract a war（延长战争）；The cat protracted its paws.（猫伸出了爪子。
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　　美国代表团团长希尔表示，除了朝鲜，其他五方都已经同意在中方提出的共同文件第四份草案上签字。他强调美方不愿向朝鲜施加压力，这应该是朝鲜自己的选择。

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