索引词：extent & extant
例文：extent [ikˈstɛnt] n[C] 规模；范围；程度；限度 注意区分extent与extant extant [ikˈstænt] adj. (formal) still existing in spite of being very old: 现存的，留存下来的 extent是法律文件中使用频率极高的词汇，常用于to some extent, to the extent that 这样的短语。 [例1] All decisions relating to the extent and mode of travel and other reimbursable expenses should be made with concern for efficiency and economy. 有关差旅范围和方式以及其他可报销费用的所有决定应当注重效率和节约。 [例2] Contractor, including its staff, shall view and Process Owner Personal Data only on a need-to-know basis and only to the extent necessary to perform this Agreement or Owner’s further written instructions. 承包商（包括承包商的工作人员）应当仅在必要的时候，而且仅以履行本协议或业主的其他书面指示为目的，查阅和加工业主的个人资料。