学校正在扩建操场。
The school is expanding its playground.
扩建
to extend (a building, an airport runway etc)
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Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
扩
建
Nice writing!
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Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
扩
See it in sentences
机场扩建后变得更大更先进。
After the expansion, the airport became bigger and more advanced.