| 序号 | 英文 | 音标 | 词性 | 中文 |
| | principal meridian | | | 主子午线 |
| | principal minor | | | 主子式 |
| | principal minor determinant | | | 主子式 |
| | principal mode | | | 主要模(式) |
| | principal moment | | | 主要势差 |
| | principal moment of inertia | | | 主惯性矩 |
| | principal nilpotent element | | | 主幂零元素 |
| | principal norm | | | 主范数 |
| | principal normal | | | 主法线 |
| | principal normal form | | | 主范式 |
| | principal normal section | | | 主正截面 |
| | principal note | | | 保证期票 |
| | principal of a loan | | | 贷款本金 |
| | principal of business house | | | 商行负责人 |
| | principal office | | | 总社 |
| | principal orbit | | | 主轨道 |
| | principal order | | | 主序 |
| | principal order module | | | 主序模 |
| | principal organ | | | 主要机构 |
| | principal orientation direction | | | 主取向方向 |
| | principal oscillation | | | 主振动, 主振荡 |
| | principal outstanding | | | 未偿本金 |
| | principal parts | | n. | （英语）动词的主要变化形式 |
| | principal piece | | | 主段 |
| | principal plane | | | 主平面 |
| | principal plane of inertia | | | 主惯性平面 |
| | principal polarization plane | | | 主极化面 |
| | principal produce | | | 主产物收获 |
| | principal products | | | 主要产品 |
| | principal radius of curvature | | | 主曲率半径 |
| | principal ray | | | 主鳍条 |
| | principal reaction | | | 主要反应 |
| | principal reflection | | | 主反射 |
| | principal refractive index | | | 主折射率 |
| | principal right ideal | | | 主左[右]理想 |
| | principal root | | | [数]主根 |
| | principal saddle | | | 主座板 |
| | principal section | | | 主截面, 主剖面, 主断面 |
| | principal series | | | 主线系, 主系列 |
| | principal shaft | | | 主轴 |
| | principal shareholder | | | 主要股东 |
| | principal sheet | | | 主页, 主枝 |
| | principal shock | | | 主震 |
| | principal signal | | | 主体信号(机) |
| | principal space | | | 主空间 |
| | principal square root | | | 主平方根 |
| | principal statement | | | 主要报表 |
| | principal station | | | 总厂, 总站 |
| | principal steering station | | | 主操舵部位 |
| | principal stress | | | 主应力 |
| | principal subspace | | | 主子空间 |
| | principal sum | | | 本金 |
| | principal sum of the bill of exchange | | | 汇票所载的金额 |
| | principal tensor | | | 主张量 |
| | principal term | | | 主项 |
| | principal tetrahedron | | | 主四面体 |
| | principal to the contract | | | 合同的直接参与者 |
| | principal tone | | n. | 主音 |
| | principal trace | | | 主迹 |
| | principal trade partners | | | 主要贸易地区 |
| | principal transversal | | | 主横断面 |
| | principal trihedral | | | 主要三面形 |
| | principal variable | | | 主变数 |
| | principal vector | | | 主向量 |
| | principal vein | | | (同翅亚目昆虫)主脉 |
| | principal velocity | | | 主速度 |
| | principal vestibular nucleus | | | 前庭内侧核 |
| | principal wave | | | 主波, 基波 |
| | principal windings | | | 主绕组 |
| | principal word | | | 主要词 |
| | principal work | | | 主业 |
| | principalamount | | | 本金金额 |
| | principality | 7prinsi5pAliti | n. | 公国, 侯国 |
| | principally | 5prInsIplI | adv. | 主要地 |
| | principalrepresentation | | | 主表示 |
| | principalship | | n. | 首要的地位,职务 |
| | principalvalue | | | 主值 |
| | principate | 5prinsipit | n. | 元首统治 |
| | principia | | n. | 原则, 基本原则, 基本原理 |
| | principial | prIn`sIpIEl | adj. | 原始的 |
| | principium | prin5sipiEm | n. | 原理, 初步 |
| | principle | 5prinsEpl | n. | 法则, 原则, 原理 |
| | principle audit | | | 控股公司审计 |
| | principle felling | | | 主伐 |
| | principle layout | | | 总布置图 |
| | principle mark | | | 主标志 |
| | principle market | | | 主要市场 |
| | principle of Clausius | | | 克劳修斯原理 |
| | principle of a single product | | | 单一产品原理 |
| | principle of abstraction | | | 抽象原则 |
| | principle of accounting | | | 会计原则, 会计原理 |
| | principle of action and reaction | | | 作用与反作用相等原理 |
| | principle of action through medium | | | 媒质作用原理 |
| | principle of analytic continuation | | | 解析开拓原理 |
| | principle of audiatur et altera pars | | | 审理案件时被告应能答辩的原则 |
| | principle of backward induction | | | 反向归纳原理 |
| | principle of causaproxima | | | 近因原则 |
| | principle of centrality | | | 集中原则 |
| | principle of charge compensation | | | 电荷补偿原则 |
| | principle of clarity | | | 明晰清楚原则 |
| | principle of classification | | | 分类原则 |