| 词性词形谱(n)underground(n)grounding grounds groundage grounder groundlessness groundling ground(v)ground(a)underground ≠ overground grounded groundless(ad)underground groundedly groundlessly underground 义务阶段1500 全国卷频次：22 /ˈʌndəɡraʊnd/ US /ˈʌndərɡraʊnd/ a.&n. 地下的 & Am subway 地铁 高考真题原句提选：It come from underground.它来自地下。It is very convenient to travel in London by Underground.在伦敦乘坐地铁非常方便。 |