every dog has his day 凡人皆有得意日；人人皆有得意时；人皆有出头日；人皆有得意时；时来运转

【例句】
Every dog has his day: that was mine.
凡人皆有难忘日，那天就是我难忘的日子。

Just take it as a process of preparation and accumulation and believe every dog has his day.
就把它当作是个积累和准备的过程，并坚信人人都有出头之日。