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1·He argues they are familiar with the U.S. economy, where foreign trade makes up a small proportion of economic output and where there are what he calls' long-lasting nominal rigidities'.

他辩称，他们熟悉美国经济，而美国的经济中外贸只占经济产值的一小部分，而且还有他所说的“为时已久的名义刚性(nominal rigidities)”。

2·Secondly, model output tracking robust control is proposed under the large-scale mode aggregation and the condition that the controlled nominal system is similar to the reference model.

然后从大系统模型集结为背景提出模型输出跟随控制问题，研究了被控系统的标称系统与理想模型相似时的模型输出跟随控制系统的鲁棒控制问题。

3·He argues they are familiar with the U. S. economy, where foreign trade makes up a small proportion of economic output and where there are what he calls' long-lasting nominal rigidities'.

他辩称，他们熟悉美国经济，而美国的经济中外贸只占经济产值的一小部分，而且还有他所说的“为时已久的名义刚性(nominal rigidities)”。