垫平

bǎ qiú chǎng diàn píng

把球场垫平

level up a court

diàn píng dì miàn

垫平地面

level up the ground

jiàn fáng qián yào xiān bǎ dì jī diàn píng

建房前要先把地基垫平。

The site must be levelled before it is built upon.