| 序号 | 英文 | 音标 | 词性 | 中文 |
| | back substitution | | | 回代, 倒转代换 |
| | back support | | | 后撑 |
| | back sweetening | | | 加硫醇后以试硫液脱残余游离硫法 |
| | back talk | | n. | <口>回嘴, 顶嘴(尤指对上级或长辈的顶撞),反唇相讥 |
| | back taper | | | 倒锥 |
| | back taper tap | | | 机用丝锥 |
| | back tax | | | 退缴税 |
| | back tender | | | 干燥工(造纸) |
| | back the oars | | | 倒着划浆 |
| | back the sails | | v. | 使船倒退 |
| | back the wrong horse | | v. | 下错赌注 |
| | back titration | | | 回滴定, 反滴定(法), 余液滴定 |
| | back to back | | n. | 背对背, 紧接 |
| | back to front | | adj. | 杂乱无序的 |
| | back to square one | | | 问题回到原态,并没有解决 |
| | back to the salt mines | | | [口]重新工作, 重操旧业, 又要辛苦一番了 |
| | back tracking | | | 反向跟踪 |
| | back transient | | | 反向瞬变过程 |
| | back tube sheet | | | 焙烤铁板 |
| | back turn | | | 逆向匝, 反作用匝 |
| | back turn pulley | | | 倒带轮 |
| | back up | | v. | 支持, 倒退, 裱 |
| | back up copy | | | 副本 |
| | back valve | | | 回动阀, 止回阀, 逆止阀, 单向阀 |
| | back veneer | | | (胶合板之)里板 |
| | back view | | | 后视图 |
| | back vision | | | 后视 |
| | back ward roll | | | 后滚翻 |
| | back washing | | | 回洗, 回冲, 反溅 |
| | back washing machine | | | 复洗机 |
| | back water | | adv. | 倒划, 退缩 |
| | back water suppressor | | | 回水减低设备 |
| | back wave | | | 反射波, 回波 |
| | back wiring | | | 背面布线,反面布线 |
| | back woods wood | | | 处女林 |
| | back-alley | `bAk`AlI | n.；adj. | n. 穷街陋巷,狡诈的手段；adj. 陋巷的, 穷困的 |
| | back-bencher | | n. | 英国国会下院之普通议员 |
| | back-busting | | adj. | (=backbreaking)辛苦的, 辛劳的 |
| | back-call | | n. | (推销员对顾客的)第二次访问 |
| | back-check | `bAktFek | n. | 检查, 查验(工作或报告等) |
| | back-crawl | | n.；vt. | n. vi.反手拍球, 仰泳；vt. 用反手击 |
| | back-end | | n. | 后端 |
| | back-fence | `bAk`fens | adj. | 邻居的, 邻居间的 |
| | back-formation | | n. | 逆构法 |
| | back-order | `bAk9R:dE(r) | v. | 订(期货) |
| | back-page | `bAkpeIdV | adj. | 登在报纸最后部分的 |
| | back-seat driver | | n. | 不断地告诉司机如何开车的乘客 |
| | back-stop | | n. | 〈板球〉本垒后的位置 |
| | back-to-back | | adj. | 紧接的, 背靠着背的 |
| | back-to-nature | | adj. | 回归自然的 |
| | back-up | | | (=back up) v.n.备份 |
| | backabbr. | | vt. | （为使之蓬松）逆梳（头发） |
| | backache | 5bAkeIk | n. | 背痛 |
| | backacting shovel | | | 反铲(挖土机) |
| | backbeat | `bAkbi:t | n. | (尤指摇摆舞曲的)基调强节奏 |
| | backbench | 5bAk5bentF | n.；adj. | n. 后座议员席(指英国下院中普通议员坐的后排坐席)；adj. 后座议员的 |
| | backbencher | | n. | 后座议员(指英国下院的后坐议员,普通议员) |
| | backbend | `bAkbend | n. | 卖艺人身体向后仰作弓状的姿势 |
| | backbit | | vbl. | backbite的过去式 |
| | backbite | 5bAkbaIt | v. | n.背后诽谤, 背后中伤 |
| | backbiter | | n. | 背后诽谤者 |
| | backbiting | | n. | 诽谤, 中伤 |
| | backbitten | | vbl. | backbite的过去分词 |
| | backblocks | | n. | (AuE) 人烟稀少的腹地 |
| | backboard | `bAkbR:d | n. | 后挡板, 靠背板, 篮板, 背板 |
| | backbone | 5bAkbEun | n. | 脊椎, 中枢, 骨干, 支柱, 意志力, 勇气, 毅力, 决心 |
| | backbone chain | | | 主链 |
| | backbone frame | | | 脊梁架 |
| | backbone motion | | | 主链运动 |
| | backboned | | adj. | 有脊椎骨的, 有脊椎的, 有骨气的 |
| | backbook authority | | | 未支出预算结余 |
| | backbreaker | `bAk9breIkE(r) | n. | 艰苦的工作, 工作勤奋的人 |
| | backbreaking | 5bAkbreIkIN | adj. | 非常辛劳的 |
| | backburner | | | 不重要的 |
| | backcast stripping | | | 倒堆剥离 |
| | backchat | 5bAktFAt | n. | 回嘴, 顶嘴, 机智诙谐的交谈, 反诘 |
| | backcloth | 5bAkklRW | n. | 背景幕, 背景 |
| | backcountry | | | [美]穷乡僻壤 |
| | backcountry district | | | 边远地区 |
| | backcourt | `bAk9kR:t | n. | 距球门最远的场地 |
| | backcourtman | `bAk9kR:tmEn | n. | (篮球队的)后卫 |
| | backcross | `bAk9krCs | n. | [生]回[逆]交, 回交杂种 |
| | backcross parent | | | 回交亲本 |
| | backcross ratio | | | 回交比率 |
| | backcycling | | | 反循环 |
| | backdate | bAk5deIt | vt. | 回溯 |
| | backdoor | 9bAk`dR:(r) | adj. | 秘密的 |
| | backdoor financing | | | 后门融通资金 |
| | backdoor selling | | | 后门销售(指绕开采购人员直接将货物销售给使用部门) |
| | backdoor spending | | | (政府的)不合法开支 |
| | backdown | | n. | 退却, 投降 |
| | backdrift | | | 后退偏航 |
| | backdrop | 5bAkdrRp | n. | 背景幕, (事件的)背景 |
| | backed | bAkt | adj. | 有背的, 有财力支持的 |
| | backed stamper | | | 复制模 |
| | backedge | | | 后脊 |
| | backen | `bAkEn | vi.；vt. | vi. (风)逆时针方向转变 ；vt. <方>阻碍…的发展 |
| | backer | 5bAkE(r) | n. | 支持者 |
| | backfall | | n. | 将对方压制倒地背着垫子以取胜的手法 |
| | backfeed factor | | | 反馈因数 |
| | backfence | | | 邻居间的,隔壁邻舍的 |