流利: fluent...
纵横交错: criss-crossed (idiom)...
争端: dispute, controversy, conflict...
首脑: head (of state), summit (meeting), leader...
歹徒: evildoer, malefactor, gangster, hoodlum...
海水: seawater...
名副其实: not just in name only, but also in reality (idiom), aptly named, worthy of the name...
常年: all year round, for years on end, average year...
千方百计: thousand ways, a hundred plans (idiom); by every possible means...
降落: to descend, to land...
