Seven-hour shifts usually involve an hour on and an hour off.
7个小时的轮班制度经常包含一个小时在前线，一个小时在幕后这样来来回回。
Price changes usually involve an investment of time and energy by each of these parties.
价格变化通常与参与各方投入的时间和精力有关。
These vacations usually involve romantic beaches or remote islands.
这些假期通常与浪漫的海滩或遥远的岛屿有关。
Courses usually involve some time working in an out-patient clinic as well as classroom study.
通常，课程还包括了有些时候在门诊诊疗所工作，就像课堂学习一样。
Free dates in the summertime usually involve going to the beach.
夏季的免费约会通常回去海滩。
Energy technology projects are usually large in scale and involve considerable basic research.
能源科技项目规模大，基础性强。
This usually dosen't involve fortune and power.
这通常和财富、和权力无关。
This usually dosen't involve fortune and power.
这通常和财富、和权力无关。
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