必要 (bì yào): necessary

The doctor told him that if he wants to fully recover, taking medicine on time and getting proper rest are necessary.

Before the interview, we felt it was necessary to check the resume again to make sure there were no mistakes.

If you come across a question you don't understand, it's absolutely necessary to ask the teacher for help; don't just guess randomly.

To ensure safety, it is necessary to carefully read the operating instructions before every experiment.

The company believes there is no need to work overtime on weekends; as long as everyone improves efficiency during normal hours, that's fine.