人质: hostage...
枢纽: hub (e.g. of traffic network), hinge, pivot, fulcrum...
同类: similar, same type, alike...
一度: for a time, at one time, one time, once...
地理: geography...
指头: finger, toe...
收取: to receive, to collect...
口号: slogan, catchphrase...
记性: memory (ability to retain information)...
奇花异草: very rarely seen, unusual (idiom)...
