to open a computer system so that it can be used.
As a graduate student, Erin often logged on to the system from home around midnight.
Internet companies are trying to help business travelers log in while they're on the road.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。