to be
until
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→nai3zhi4 • nǎizhì
and even
even, even until, go so far as to, go so far as
他 的 影响 遍及 全国， 乃至 世界。
His influence extends across the country and even the world.
这 个 问题 影响 了 公司， 乃至 整个 行业。
This issue has affected the company and even the entire industry.
这 次 事故 影响 了 城市 交通， 乃至 整个 国家。
This accident affected city traffic and even the entire country.