intervalve

例句：

1. 1. The scientist observed the earth's rotation and calculated the time interval between each full moon.
   科学家观察地球自转并计算了每个满月之间的时间间隔。
2. 2. During the break, students took a short interval to rest their eyes.
   休息期间，学生们短暂地休息眼睛。
3. 3. The project required careful planning of the intervals between tasks.
   该项目需要仔细规划任务之间的间隔。