西安坐落于可以用英语表达为：”Xi’an is situated in…” 或者 “Xi’an is located in…”. 在这里，“situated”和“located”都是正确的动词，用来描述西安的地理位置。以下是一些可能的完整句子：
- Xi’an is situated in the northwestern part of China.
- Xi’an is located in the province of Shaanxi.
- The ancient city of Xi’an is situated in the heart of Shaanxi province.