This is the 773rd most frequent Chinese word.
长期
"长期" means "long-term."
Refers to an extended duration of time necessary for preparation.
这个项目需要长期筹备。
This project requires long-term preparation.
Denotes goals or plans that are to be achieved over an extended timeframe.
长期目标是发展可持续能源。
The long-term goal is to develop sustainable energy.
Implies continuous exposure for an extended period, stressing the duration.