His term of office resulted in major territorial additions to the USA: Texas was admitted to the Union in 1845, and the successful outcome of the conflict with Mexico resulted in the annexation of California and the south-west two years later.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。