那是因为随着中国经济增长的加速，贸易失衡将增加美国的挫折感，加上选举临近，美国两大政党的立法者都会在各个议题上威胁对中国采取惩罚性行动。
For, as China’s growth accelerates, trade imbalances heighten US frustrations, and elections loom, lawmakers of both US political parties will threaten punitive action against China on a variety of subjects.