A proverb meaning that great things are not achieved quickly—Rome wasn't built in a day; patience and steady effort are required.
英語がすぐに上手になるわけではない。ローマは一日にして成らずだ。
You won't become proficient in English overnight. Rome wasn't built in a day.
会社を立ち上げたばかりで焦らないで。ローマは一日にして成らずというだろう。
Don't rush after just starting a company. As they say, Rome wasn't built in a day.
長期的な視点で取り組め。ローマは一日にして成らずだ。
Work with a long-term perspective. Rome wasn't built in a day.