1. 破土;动工：ground-thermometer 地温计 | groundbreaking 破土;动工 | grounded neutral 接地中性点

2. 开创性的：fiasco惨败 | groundbreaking开创性的 | Whimsical变化无常

3. 突破性的：physics laureates物理奖得主 | groundbreaking突破性的 | communications technology通讯科技

noun

1. the ceremonial breaking of the ground to formally begin a construction project

Synonym: groundbreaking ceremony