back 1
back的音标和读音：
DJ音标发音： [bæk]
KK音标发音： [bæk]
back的词性：
n.（名词）
1. The posterior portion of the trunk of the human body between the neck and the pelvis; the dorsum.
背部：人体躯干的后部，在脖子和骨盆之间；背部
2. The analogous dorsal region in other animals.
动物的背部：其它动物相似的背部部位
3. The backbone or spine.
脊骨或脊柱
4. The part or area farthest from the front.
后部：离前面最远的部分或地区
5. The part opposite to or behind that adapted for view or use:
背面，反面：与看见或使用的部分相反或在其后面的部分：
the back of the hand; wrote on the back of the photograph.
手背；写在照片背面
6. The reverse side, as of a coin.
反面：反面，如硬币的反面
7. A part that supports or strengthens from the rear:
靠背：从后部支持或加强的部分：
the back of a couch.
睡椅的靠背
8. The part of a book where the pages are stitched or glued together into the binding.
书脊：书页被装订或粘在一起成册的滚边部分
9. The binding itself.
装订本身
10. Sports
【体育运动】
11. A player who takes a position behind the front line of other players in certain games, such as football.
后卫：在某种比赛项目中，如足球，处在其它运动员前线位置之后的运动员
12. This playing position.
后卫位置
back的词性：
v.（动词）
back的词性：
v.tr.（及物动词）
13. To cause to move backward or in a reverse direction:
使倒退：引起向后或相反方向移动：
Back the car up ten feet and then make the turn.
把车向后倒10英尺然后转弯
14. To furnish or strengthen with a back or backing.
背靠，加固：用后背或支持物装备或加强
15. To provide with financial or spiritual help; support or sustain:
支持，后援：提供财政的或精神上的帮助；支持或维持：
backed our candidate with a $1,000-a-plate dinner.See Synonyms at support
以一人1000美元的晚餐为我们的候选人打气参见 support
16. To bet or wager on.
打赌：打赌或用…赌博
17. To adduce evidence in support of; substantiate:
引证，证明：提出证据支持；证明，证实：
backed the argument with facts.
用事实证明论点
18. To form the back or background of:
形成…的背部或背景：
Snowcapped mountains back the village.
白雪皑皑的山峦形成了村庄的背景
back的词性：
v.intr.（不及物动词）
19. To move backward.
倒退：向后移动
20. To shift to a counterclockwise direction. Used of the wind.
逆时针转向：转变为逆时针方向。用于指风
back的词性：
adj.（形容词）
21. Located or placed in the rear:
后部的：位于或安置在后面的：
Deliveries should be made at the back entrance.
交货应在后面的入口处
22. Distant from a center of activity; remote.
偏远的：远离活动中心的；偏远的
23. Of a past date; not current:
过时的，不流行的：属于过去的日子的；不是现时的：
a back issue of a periodical.
过期的期刊
24. Being owed or due from an earlier time; in arrears:
积欠的：较早时期应拥有或到期的；拖欠的：
back pay.
欠薪
25. Being in a backward direction.
向后的：处于向后的方向的
26. Linguistics Pronounced with the back of the tongue, as oo in cool. Used of vowels.
【语言学】 舌根的：用舌根发音的，如oo 在 cool 一词中的发音。用于元音字母
back的词性：
adv.（副词）
27. At, to, or toward the rear or back; backward.
在后地，向后地：在、到或向着后面或后部地；向后地，落后地
28. In, to, or toward a former location:
回到原处：在、到或向着从前的位置：
went back for the class reunion.
参加同班同学会
29. In, to, or toward a former condition.
回到原先状态：在、到或向着从前的状态地
30. In, to, or toward a past time.
从前地：在、到到向着过去的年代地
31. In reserve or concealment.
储存地或隐蔽地
32. In check or under restraint:
阻挡地：处于被节制或被隐瞒的状态：
Barriers held the crowd back.
栅栏将群众挡住了
33. In reply or return.
回答或归还
34. To withdraw from a position; retreat.
撤退：从某个位置撤离；撤退
35. To withdraw from a position, opinion, or commitment.
让步，放弃：从某个位置、观点或义务中撤出
36. To retreat or draw away.
撤回或离开
37. To withdraw from (an enterprise or a plan) before completion.
中途退出：在完成之前从（某项计划或事业）中退出
38. To fail to keep a commitment or promise.
失言：没有履行义务或诺言
39. To cause to accumulate or undergo accumulation:
使聚集：引起堆积或经过积累：
The accident backed the traffic up for blocks. Traffic backed up in the tunnel.
事故引起了交通阻塞。在地下道中引起了交通阻塞
40. Computer Science To make a backup of (a program or file).
【计算机科学】 备份：为（程序或文件）备份
41. Nautical To maneuver a vessel in a narrow channel by adjusting the sails so as to let the wind in and out of them in alteration.
【航海】 调整航向：在狭窄的水道中操纵船，通过调整风帆以便使风帆间进出的风向有所改变
42. To vacillate in one's actions or decisions.
举棋不定：在行动与决定之间犹豫不决
back的词源：
43. Middle English bak
中古英语 bak
44. from Old English b?c
源自 古英语 b?c
back的词性：
adj.（形容词）
back的用法：
45. The expression back of is an informal variant of in back of and is best avoided in writing: There was a small stable in back of (not simply back of ) the house.
表达方式back of 是 in back of 的一种不正式的变形方式， 最好避免在书面语中运用，如：There was a small stable in back of（不要简单地说成 back of ） the house （房后有一个小马厩）
back 2
back的音标和读音：
DJ音标发音： [bæk]
KK音标发音： [bæk]
back的词性：
n.（名词）
46. A shallow vat or tub used chiefly by brewers.
大浅桶：主要供酿酒商用的一种浅的盆或缸
back的词源：
47. Dutch bak
荷兰语 bak
48. from French bac
源自 法语 bac
49. from Old French [boat]
源自 古法语 [船]
50. from Vulgar Latin *baccus [vessel]
源自 俗拉丁语 *baccus [船，容器]
51. [probably of Celtic origin]
[可能源于凯尔特语的]