1·Technology is therefore indispensible for parcel delivery during this period.
因此，在此期间，技术支持对于包裹的派送是不可或缺的。
2·The evaluation criteria for rationality of practice should be defined respectively according to the three indispensible parts:rationality of end, rationality of instrument and rationality of value.
实践合理性的评价标准应当从实践合理性三个不可或缺的组成部分（目的合理性、工具合理性、价值合理性）分别加以考察。
3·The indispensible practice of organizing a banquet when signing an important contract especially a sale and purchase contract for real estate dates back to the Western Ham Dynasty at least.
至少从西汉时期起，签订契约尤其是签订田宅买卖契约，往往要举办酒席宴请有关人员。举办宴席成为传统社会人们签定重要契约不可或缺的仪式。
4·Meanwhile, I will try to practise my eloquence because it's a a indispensible element for me to be qualified for such a excellent occupation.
与此同时，我要锻炼我的口才，因为这是不可或缺的因素对于这个行业。