很多说法是约定俗成的。
Many sayings are fixed by usage.
约定俗成
established by popular usage (idiom); common usage agreement; customary convention
HSK 3.0 · Band 7 trad. 約定俗成
Watch it being written
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
约
定
俗
成
Nice writing!
Build with these blocks
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
约
定
俗
See it in sentences
这个用法约定俗成了吗？
Has this usage become customary?