The participants each slept in the department for two nights and were carefully monitored with techniques that looked at the activity of their brains.
2017年12月四级真题（第一套）阅读 Section C
We validated these expectations in a study in which two other psychologists and I monitored 373 students for two years during the transition to junior high school, when the work gets more difficult and the grading more strict, to determine how their mind-
2016年12月四级真题（第二套）阅读 Section B
英语六级真题
The extreme isolation of these massive farms leaves them often unattended, and monitored only once or twice a year, which means if the livestock falls ill or requires assistance, it can be a long time for farmers to discover.
2018年12月六级真题（第三套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
VERB
监控;监视;监督
If you monitor something, you regularly check its development or progress, and sometimes comment on it.