英音 [bæk] 美音 [bæk]
the posterior part of a human (or animal) body from the neck to the end of the spine;
"his back was nicely tanned"
the side that goes last or is not normally seen;
"he wrote the date on the back of the photograph"
the part of something that is furthest from the normal viewer;
"he stood at the back of the stage"
"it was hidden in the rear of the store"
(football) a person who plays in the backfield
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord;
"the fall broke his back"
the protective covering on the front, back, and spine of a book;
"the book had a leather binding"
the part of a garment that covers the back of your body;
"they pinned a `kick me' sign on his back"
a support that you can lean against while sitting;
"the back of the dental chair was adjustable"
(American football) the position of a player on a football team who is stationed behind the line of scrimmage
related to or located at the back;
"the back yard"
"the back entrance"
located at or near the back of an animal;
"back (or hind) legs"
"the hinder part of a carcass"
of an earlier date;
"back issues of the magazine"
in or to or toward a former location;
"she went back to her parents' house"
at or to or toward the back or rear;
"he moved back"
"tripped when he stepped backward"
"she looked rearward out the window of the car"
in or to or toward an original condition;
"he went back to sleep"
in or to or toward a past time;
"set the clocks back an hour"
"never look back"
"lovers of the past looking fondly backward"
"he wrote back three days later"
in repayment or retaliation;
"we paid back everything we had borrowed"
"he hit me and I hit him back"
"I was kept in after school for talking back to the teacher"
be behind; approve of;
"He plumped for the Labor Party"
"I backed Kennedy in 1960"
"back into the driveway"
"The car backed up and hit the tree"
give support or one's approval to;
"I'll second that motion"
"I can't back this plan"
"endorse a new project"
cause to travel backward;
"back the car into the parking spot"
support financial backing for;
"back this enterprise"
be in back of;
"My garage backs their yard"
place a bet on;
"Which horse are you backing?"
"I'm betting on the new horse"
shift to a counterclockwise direction;
"the wind backed"
establish as valid or genuine;
"Can you back up your claims?"
strengthen by providing with a back or backing
aback adv. 吃惊地;向后;<航海>（帆船）突遇顶风而停止前进; adj. <航海>处于顶风位置的;
answerback [电] 回答;
backache n. 背痛，腰痛;
backbeat n. （尤指爵士乐、流行乐的）基调强节奏;
backbench n. 后座议员席位;
backbite vt.& vi. 中伤;
backboard n. （篮球）篮板;
backbone n. 脊梁骨，脊椎;分水岭;支柱;决心，毅力;
backbreaking adj. （体力劳动）艰苦繁重的，累死人的;
backcloth n. （尤指戏剧中用的）背景幕布;
backcourt n. 距球门最远的场地;
backcross n. 回[逆]交，回交杂种; vt. 使回交; vi. 回交;
backdoor adj. 秘密的;
backdrop n. <戏>背景幕布;背景;交流声;
backed adj. 有背的，有财力支持的; v. （使）后退， （使）倒退( back的过去式和过去分词 );支持;作…的衬里;（用证据或理论来）证实（一种理论或主张）;
backer n. 支持者，赞助者;（打字机的）垫纸;（赛马等的）赌客;
backfield n. 守卫区;守卫队员，守卫队员的位置;
backfire vi. 发生回火;适得其反，事与愿违的结果; n. 逆火;
backgammon n. 西洋双陆棋;
background n. （画等的）背景;底色;背景资料;配乐;
backgrounder n. 政府官员举行的记者招待会;
backhand n. 反手，反手击球;
backhanded adj. （恭维话）讽刺挖苦的;假惺惺的;（网球等运动）反手击球的;用反手的;
backhoe n. 反铲挖土机;
backing n. 支持;支持者;背衬;<口>（独唱或独奏的）伴奏; v. （使）后退，（使）倒退( back的现在分词);支持;作…的衬里;（用证据或理论来）证实（一种理论或主张）;
backlash n. 反击;后坐;激烈反应;
backlight n. 背后照明; vt. 从背后照亮;
backlist n. 存书目录，重版书目录;
backlit adj. 从背后照亮的;
backlog n. 积压未办之事;没交付的订货;存货，储备; vt. （使）积压;储存;
backpack n. （指登山者、步行者使用或背小孩时使用的）背包， （有轻金属框的）箱形背包; vi. 背着背包徒步旅行;
backpedal vi. 改变主意，变卦，背弃诺言;
backrest n. （家具的）靠背;
backroom adj. （工作）秘密的，在幕后进行的;，（人）幕后的; n. 密室;
backsaw n. （以金属在背部加厚的）短锯;
back-to-back adj. 背靠背的;连续的，一个接一个的; n. 连排式房屋（侧面和背面相连接）（英式英语）;
back to back 背靠背;背对背;
back shift 二次变换;
back stairs n. 后楼梯，诡秘的手段或方法;
back play 空程，空隙;
kick back 踢回;<非正>复发;退还;突然反冲;
phasing back 后相;
back poppet 后顶针座，后随转尾座;
back tax 退缴税;
claw-back n. 加税补偿，缺点;
fish back 锯齿板，梳齿隔板;
back-to-back testing 反馈试验，背靠背试验;
back-to-back circuit 背对背电路;
back to back diodes 背对背二极管;
back-to-back test 成对试验，整流子片试验;
back-to-back starting 反向起动;
back-by-back display 双向距离显示器;
back-to back credit [法] 背对背信用状，对开信用状;
back-to-back method 背靠背法，反馈法;
back to back method 反馈法;
back to back credit [经] 对开信用证书，转开信用证书;
back-to-back running 反馈运行，背靠背运行;