n. 拱顶, 窖, 地下室, 撑竿跳, 穹窿

vt. 做成圆拱形, 撑竿跳过

vi. 成穹状弯曲, 跳跃

n. a burial chamber (usually underground)

n. a strongroom or compartment (often made of steel) for safekeeping of valuables

n. an arched brick or stone ceiling or roof

n. the act of jumping over an obstacle