使用年限 shǐyòngniánxiàn service life Definitions Defs Origin Strokes Stroke Words Sentences Sents 使用 shǐyòng verb to use to use; to employ; to apply; to make use of tools, people, or resources for a specific purpose年限 niánxiàn time limit fixed number of years; age limit; a lifespan or duration set by law, regulation, or standard
