他一一回答了问题。
He answered the questions one by one.
一一
one by one; one after another
adverb HSK 3.0 · Band 6
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.
一
一
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.
一
See it in sentences
问题一一解决了。
The problems were solved one by one.