本文作者想打破这一局面，旨在对诗歌翻译过程中外部制约因素进行尝试性的研究。
The author intends to make a tentative study on the external constraints which function in the operation of poetry translation.
建筑工程项目设计中的工作受到许多外部和内部的制约，这些因素影响着建筑结构专业人员的潜能发挥。
Works of building project design receive a lot of outside and inside restriction, These Factor influence latent energy of architect or structure engineer give play to.
但应同时看到与外部经济体密切相连的和各种制约因素也很多。
But the various restraints closely related with external economic entities should deserve equal attention.
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