设施建设滞后了。
Building of facilities has lagged.
滞后
to lag behind
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.
滞
后
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.
See it in sentences
反应为什么会滞后？
Why is the reaction delayed?