the [party] primary
这里的 primary 是可数名词，指政党预选。
The Republican primary will be held next month.
共和党初选将于下个月举行。
初选；预选
小学；原色；基色；基础；基本成分；小学一年级；初级飞羽
A primary election; a preliminary election to select a political candidate.
初选；为选出政党候选人或两轮选举的第一轮而进行的预选。
A primary election; a preliminary election to select a political candidate of a political party, or the first round of a two-round election.
初选
a preliminary election where delegates or nominees are chosen
小学一年级。
The first year of grade school.
初级飞羽
one of the main flight feathers projecting along the outer edge of a bird's wing
基本或基础成分；不可再分的东西。
A base or fundamental component; something that is irreducible.
主星
(astronomy) a celestial body (especially a star) relative to other objects in orbit around it
引力束缚系统中最重的组成部分,如行星相对于其卫星。
The most massive component of a gravitationally bound system, such as a planet in relation to its satellites.
小学。
A primary school.
鸟类附着在手部的飞羽。
Any flight feather attached to the manus (hand) of a bird.
原色。
A primary colour.
热核武器的第一阶段,通过裂变爆炸引发武器第二阶段的聚变反应。
The first stage of a thermonuclear weapon, which sets off a fission explosion to help trigger a fusion reaction in the weapon's secondary stage.
由雷达波反射回来的飞机(或其他物体)的雷达回波,不含来自飞机应答器的附加信息。
A radar return from an aircraft (or other object) produced solely by the reflection of the radar beam from the aircraft's skin, without additional information from the aircraft's transponder.
疾病的原发部位；疾病的最初位置或来源。
The primary site of a disease; the original location or source of the disease.
直接驱动的感应线圈,如变压器或感应电机中与次级磁耦合的线圈。
A directly driven inductive coil, as in a transformer or induction motor that is magnetically coupled to a secondary.
Many states hold their primary in March.
许多州在三月举行初选。
用法提示：此处'primary'作为名词，指初选。
The bird's primaries are damaged, so it cannot fly well.
这只鸟的初级飞羽受损，所以飞不好。
用法提示：此处'primaries'是'primary'的复数形式，指初级飞羽。
The planet's primary is a massive star.
这颗行星的主星是一颗巨大的恒星。
用法提示：此处'primary'作为名词，指天文中的主星。
这里的 primary 是可数名词，指政党预选。
The Republican primary will be held next month.
共和党初选将于下个月举行。
win/lose 后面直接接 primary，不用介词。
She lost the primary by only one percent.
她仅以一个百分点的差距输掉了初选。
表示“在初选中投票”时，用 in the primary。
Make sure you vote in the primary.
一定要参加初选投票。
primary 是 primary election 的常见缩略，语境明确时可互换；正式或书面语多用完整形式。
preliminary election 含义更宽，可指任何正式选举前的预选，不一定涉及政党提名；口语中不如 primary 常用。
nominating election 侧重“选出候选人”的功能，多用于政治学或正式语境；日常英语中较少直接使用。
grammar · medium
易错句子He won in primary.
正确表达He won in the primary.
名词 primary 表示“初选”时可数，单数前必须加限定词；此处指某一次具体初选，需用 the primary。
grammar · medium
易错句子The primary of the plan is to save money.
正确表达The primary goal of the plan is to save money.
primary 作名词时指“初选、原色、小学”等，不表示“主要的事”；表示“主要目标”要说 primary goal，不能把 primary 直接当名词使用。
用于 primary 的“小学”“原色”等义项。primary 和 secondary 是一对固定对应词，如 primary school（小学）对 secondary school（中学）、primary color（原色）对 secondary color（间色）。
用于 primary 的“初选”义项。初选选出政党候选人，大选由全体选民最终确定当选人，二者是同一选举流程中的对应阶段。
primary 作名词指“初选”（政党推选候选人的投票），preliminary 作名词指竞赛或考试前的“预赛、初试”，不特指选举。
primary 在英国英语中可作名词指“小学”（如 attend a primary）；elementary 是形容词，必须说 elementary school，不能单独作名词。
primary 是名词，须作主语或宾语；若要表达“主要地”这一副词含义，只能用副词 primarily，不可写成 the primary 代替。
赢得初选
She won the primary by a narrow margin.
她以微弱优势赢得了初选。
总统初选
The presidential primary will be held in March.
总统初选将于三月举行。
初选季
During primary season, the candidates travel constantly.
初选季期间，候选人不断巡回奔波。
三原色
Red, green, and blue are the three primaries.
红、绿、蓝是三原色。
primary + -ly
primary + school
primary + election
primary + color
primary + care
primary + source
拆解：无前缀；词根 prim-（意为“第一、最初”）+ 后缀 -ary（意为“与……有关的”）。同根词：prime、primitive、primarily；同后缀词：secondary、ordinary、necessary。
初选是候选人竞争党内提名的过程。
选民在初选中投票选择候选人。
初选通过选票进行投票。
部分初选选出代表参加党代会并支持候选人。
候选人在初选前会进行竞选活动以争取选票。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.