instead的用法，可作“反而”理解？补充句子的instead怎么理解？另外in place 怎么理解？

Where the vendor already has a contractual arrangement in place with Fidelity that could cover the proposed agreement, the vendor may instead submit a request to operate under these and indicate any variations required for inclusion of the Dalian AV meeting rooom enhancement solution.

instead of  介词，表代替、而不是。。。、（英译as an alternative or replacement）      后面加名词或名词性短语  e.g.Now I can walk to work instead of going by car.   instead of 后面是被替代的事物replace  动词，把。。放回原处、取代、（英译take the place of）   e.g. replace the book on the shelf in place of  介词，代替、取代   ，后面加名词或名词性短语。 e.g. Money is being used in place of something more direct. 可与instead of 互换使用。希望对你有帮助

没看懂什么意思？