a common scrubby deciduous tree of central and southeastern United States having dark bark and broad three-lobed (club-shaped) leaves; tends to form dense thickets
同义词：blackjack oak??/??jack oak??/??Quercus marilandica
a piece of metal covered by leather with a flexible handle; used for hitting people
同义词：cosh??/??sap
a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship
同义词：black flag??/??pirate flag??/??Jolly Roger
a gambling game using cards; the object is to hold cards having a higher count than those dealt to the bank up to but not exceeding 21
同义词：twenty-one??/??vingt-et-un
exert pressure on someone through threats
同义词：blackmail??/??pressure
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。