Of course not all constraints can be expressed by this model.

当然不是所有的约束都能用这种模型来表述。

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Allowing fresher viewpoints and opinions, which can only truly be expressed by younger people, is essential for any nation's literary heritage to avoid dwindling into irrelevant obscurity.

接纳年轻人所表达的真实、新鲜的观点与意见，这对于任何国家避免其文学遗产陷入无人问津的困境都意义重大。

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The fifth step involves action, and can be expressed by a verbal agreement with the person at issue.

第五个步骤就是行动，可以在争论中用言语去同意他人的观点。

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They persist because of the country's high rate of violent crime, as expressed by this Johannesburg resident who did not want to be identified.

VOA: standard.2009.06.12

Let's look at how these two different ways can be used and expressed by the same pattern.

下面我们来看看这同一个句型怎样可以用和表达这两种不同的用法。

How can I 课堂 - SpeakingMax英语口语达人

Departing Bank of Japan Gov. Masaaki Shirakawa expressed doubts about the aggressive monetary policy expected to be adopted by his successor.

WSJ: What's News

We extend our deepest thanks for the outpouring of support we have received from so many in the past few days and we sincerely hope that these changes will be welcomed by those who have expressed their concern.

FORBES: Komen Caves Under Pressure, Reinstates PP Funding

By now, however, such problems should have been in the past, especially given the ongoing concerns expressed by public health officials that mitigating the threat of cervical cancer can be best accomplished by vaccination.

FORBES: Merck & Its HPV Vaccine: Sales & Skepticism Are Both Up