实力 (shílì) is a noun meaning "strength," "capability," or "actual power." It refers to the real ability or competitive power of a person, team, or entity. For example, 马匹实力 means "the strength of the horses."
这支球队的实力越来越强了。
zhè zhī qiúduì de shílì yuèláiyuè qiáng le.
This team is getting stronger and stronger.
要想赢得比赛,光靠运气不行,得有实力。
yào xiǎng yíngdé bǐsài, guāng kào yùnqì bùxíng, děi yǒu shílì.
To win a match, luck alone won't do; you need real ability.
两家公司的实力相差不大。
liǎng jiā gōngsī de shílì xiāngchà bú dà.
The two companies are not far apart in strength.