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The main hurdles have been just getting multiple cell types to grow and work in harmony and spurring formation of the blood vessels required to nourish tissues more than a few hundredths of a millimeter thick.
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组织工程面临的最大障碍，是让多种类型的细胞生长并和谐运作，以及刺激血管的形成来滋养数十微米厚的组织。 |
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The main idea of the story's construction is the element “ recirculation “ .
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故事的结构以此元素作为主轴，表现出生命的重复、生活的无奈。 |
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The main idea of this passage is about the importance of Venus to Earth.
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这篇文章的主要内容是金星对地球的重要性。 |
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The main ideas and principal tasks for the work of the government are: to take Deng Xiaoping Theory and the important thought of Three Represents as our guide; to comprehensively put into practice the guidelines of the Party's Sixteenth National Congress
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政府工作的基本思路和主要任务是，以邓小平理论和“三个代表”重要思想为指导，全面贯彻党的十六大和十六届三中全会精神，抓住重要战略机遇期，抓好发展这个第一要务，坚持科学发展观，按照“五个统筹”的要求，更加注重搞好宏观调控，更加注重统筹兼顾，更加注重以人为本，更加注重改革创新，着力解决经济社会发展中的突出矛盾，着力解决关系人民群众切身利益的突出问题，正确处理改革发展稳定的关系，推动经济社会全面、协调、可持续发展，实现社会主义物质文明、政治文明和精神文明共同进步。 |
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The main impediment to development is the country's huge foreign debt.
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发展的主要障碍是国家欠下的巨额外债。 |
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The main impediment to development is the country's large population.
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发展的主要障碍是这个国家人口太多。 |
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The main impediment to growth is a lack of capital.
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影响发展的主要障碍是缺乏资本。 |
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The main implication is that Mars does not have tectonics capable of driving rocks to great depths (where they are heated and squeezed) and then bringing them back to the surface.
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这主要显示，火星没有板块活动，无法将岩石推入地底（它们在那里被加热、挤压）且再将它们重新带回地表。 |
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The main impression I got from the museum's displays was that the period was a mixed blessing.
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瓦萨斯特罗姆说，他从这个蜡像博物馆得到的印象是，这个时期是一个好坏参半的时期。 |
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The main impression they create is of greatness.
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他们创造的主要印象是伟大。 |
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The main income is brokerage.
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经手费是主要的收入。 |
