1) It is necessary to book tickets in advance.
有必要提前定票。
2) prerequisite
[英][,pri:'rekwəzɪt] [美][pri'rɛkwəzɪt]
必要前提
1.
This report has emphasized "no scientific development,no social harmony",which means that fulfilling the scientific view of development is the prerequisite for constructing the harmonious socialist society.
科学发展和社会和谐无疑是党的十七大报告的关键词,报告还特别强调"没有科学发展就没有社会和谐",意即落实科学发展观是构建社会主义和谐社会的必要前提。
3) essential prerequisite
必要的前提
4) all tours require advance booking.
旅游需要提前定票
5) There's no necessity to buy ticket in advance.
不需要提前买票。
补充资料：大前提
演绎推理中包含一般性知识的前提。在三段论中指包含大项的前提。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条