ebb and flow

figuratively

The flowing out and in of the tide. / (figuratively) A large flowing out and in.

Japanese Meaning

潮の満ち引き、すなわち海水が潮の干満に合わせて満ちたり引いたりする現象を指す。比喩的には、物事が周期的に変動する様子を表す。

We sat on the beach, watching the ebb and flow of the tide as the sun set.

私たちは浜辺に座って、日が沈むのを見ながら潮の満ち引きを眺めていた。

Sense（1）

The flowing out and in of the tide.

Sense（2）

(figuratively) A large flowing out and in.

I want to hear the roaring ebb and flow of Broadway

ebbs and flows

（ plural ）