surveillance

"He is an unusual individual."

"Despite thorough investigation, the perpetrator of the attacks remains unknown."

"The students walked quickly to their classrooms before the bell rang. "

"My suspicion that my neighbor was having a party last night was confirmed when I heard loud music. "

"accurate knowledge"

"a continuous current of electricity"

"The electronic configuration of atoms is important in chemistry class. "

"The teacher is monitoring the students during the test to prevent cheating. "

"It’s a good thought, but it will be a difficult thing to implement."

"The chef followed a systematic approach to preparing the meal, meticulously measuring ingredients and following each step of the recipe. "

"The teacher's observation of the student's progress showed that he was struggling with math. "

"The frequent occurrence of noisy construction near my house has made it hard to concentrate on my studies. "