This is the 7773rd most frequent Chinese word.
長時
"長時" means "long time" or "extended period."
Here, '長時' is used to describe a prolonged period during which the state of feeling exhausted occurs, emphasizing its duration.
我最近工作負荷很高，長時感到疲憊不堪。
Recently, my workload has been high, and I feel unrelentingly exhausted for extended periods.
In this sentence, '長時間' refers to an extended time duration necessary for accomplishing effective learning, highlighting the importance of sustained effort.
長時間的學習可以有效地提升你的知識水平。
Long periods of study can effectively enhance your knowledge level.
The phrase '長時' here signifies the duration during which the exposure to sunlight occurred, leading to the resultant condition, focusing on the causation linked to prolonged exposure.