| 序号 | 英文 | 音标 | 词性 | 中文 |
| | primary palate | | | 原腭 |
| | primary pancreatic island | | | 初生胰岛 |
| | primary parasite | | | 第一次寄生性昆虫 |
| | primary parietal layer | | | 初生周缘层 |
| | primary part observation | | | 重点观察 |
| | primary particle | | | 原始粒子 |
| | primary partition | | n. | 基本分区 |
| | primary peridium | | | 初生包被 |
| | primary petroleum | | | 初级石油 |
| | primary phase | | | 初晶相(熔液冷却时最初出现的结晶物质) |
| | primary phosphine | | | 伯膦 |
| | primary phytocoenosium | | | 原生植物群落 |
| | primary planet ring | | | 一级行星齿轮轴座圈 |
| | primary porosity | | | 原生孔隙 |
| | primary port | | | 主要港口 |
| | primary power source | | | 主动力源 |
| | primary press | | | 第一压榨 |
| | primary producing country | | | 初级产品生产国 |
| | primary product | | | 原始产物, 初次产物(如粮食、矿石等) |
| | primary production | | | 初级生产 |
| | primary productivity | | | 初级生产力, 第一性生产力 |
| | primary products | | n. | 初级产品,农产品 |
| | primary protective barriers | | | [核]主防护墙 |
| | primary protonema | | | 初生原丝体 |
| | primary publication | | | 原版初印, 原文出版 |
| | primary purification | | | 初步精制 |
| | primary quenching | | | 初次淬火 |
| | primary radar | | | 初级雷达 |
| | primary rainbow | | | 虹 |
| | primary rational matrix | | | 准素有理矩阵 |
| | primary reaction | | | 原发反应 |
| | primary record | | | 原始记录 |
| | primary recrystallization texture | | | 一次再结晶织构 |
| | primary reference fuel | | | 正标准燃料 |
| | primary relay | | | 一次继电器 |
| | primary reserve | | | 主要准备 |
| | primary retarder position | | | 主制动位置, 主减速器位置, 头部制动位置 |
| | primary ring | | | 准质环, 准素环 |
| | primary room | | | 低年级教室 |
| | primary root | | | [植]初生根 |
| | primary royal pair | | | (白蚁)原王偶 |
| | primary salt | | | 一代盐(一个H被取代) |
| | primary sample | | | 一次取样, 初次取样, 初次样品 |
| | primary scales | | | (加热时形成的)初次氧化皮 |
| | primary scattering | | | [物]初级散射 |
| | primary scholar | | n. | 小学生 |
| | primary school | | | 小学 |
| | primary school curriculum | | | 小学课程 |
| | primary school teacher | | | 小学老师 |
| | primary scintillator | | | 一级闪烁体 |
| | primary seal | | | 主密封, 初级封闭 |
| | primary sector | | | 初级成分 |
| | primary securities market | | | 初级证券市场 |
| | primary sedimentary structure | | | 原始沉积构造 |
| | primary segment | | | 原体节 |
| | primary segregation | | | 原生偏析 |
| | primary sensorium | | | 原感觉器 |
| | primary sere | | | 原生演替系列 |
| | primary set | | | 准素集 |
| | primary sex organ | | | 初级性器官 |
| | primary sexual character | | | 第一[初级]性征 |
| | primary shaft | | | 初动轴 |
| | primary shielding | | | 初级屏蔽, 初始屏蔽 |
| | primary ship control station | | | 舰艇主指挥部位 |
| | primary shock | | | 原发休克 |
| | primary shoot | | | 初生苗, 初生茎 |
| | primary side | | | 初级[原始]侧, 初级端, 原边 |
| | primary signal | | | 基色[原始]信号 |
| | primary signal monitor | | | 基色信号监视器 |
| | primary skip zone | | | 第一次跳越区(短波传播的) |
| | primary sludge | | | 原污泥 |
| | primary smelting | | | 初步熔炼 |
| | primary soil | | | 原生土 |
| | primary solid solution | | | [冶]原固溶体 |
| | primary solution | | | 主要解 |
| | primary solvent | | | 主要的溶剂 |
| | primary somatic hermaphrodite | | | 原体质雌雄同体 |
| | primary source | | | 原始来源, 第一手来源 |
| | primary space vehicle | | | 主航天飞船 |
| | primary speed | | | 初速 |
| | primary spermatogonium | | | 初级精原细胞 |
| | primary standard | | | 原始[一级]标准, 基准物, 原标准器 |
| | primary standard fuel | | | 正标准燃料 |
| | primary standard sound source | | | 原标准声源 |
| | primary standard substance | | | 基准物(质) |
| | primary state | | | 始态 |
| | primary statistics | | | 原始统计 |
| | primary steel | | | 通用钢(重熔钢除外) |
| | primary store | | | 主存储器 |
| | primary stratigraphic trap | | | [地质]原生地层圈闭 |
| | primary stress | | n. | 主重音 |
| | primary stress field | | | 原始应力场 |
| | primary structural component | | | 主[一次]结构件 |
| | primary structure | | | [航空]主(要)结构 |
| | primary study | | | 重点研究 |
| | primary subject | | | 主要科目 |
| | primary subscript | | | 主标 |
| | primary substation | | | 一次变电所 |
| | primary succession | | | 原生演替 |
| | primary sun gear | | | 初级[一级]太阳(齿)轮 |
| | primary suspension | | | 第一系弹簧 悬挂 |