然而西部开发是一个长期的系统工程
However, western development is a long-term systematic project
以上为机器翻译结果，长、整句建议使用 人工翻译 。
然而，西部开发是一个长期的系统工程。
However, the western region development is a long-term systematic project.
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However, the % western region development is a long-term systematic project.
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