空隙: crack, gap between two objects, gap in time between two events...
在线: online...
高大: tall, lofty...
哎: hey!, (interjection used to attract attention or to express surprise or disapprobation)...
账号: account, username...
闻名: well-known, famous, renowned, eminent...
后者: the latter...
悬殊: widely different, large disparity...
断定: to conclude, to determine, to come to a judgment...
施工: construction, to carry out construction or large-scale repairs...
