primary

詞型變化：

名詞複數:primaries 

詞意辨析：

chief, principal, main, major, leading, capital, foremost, primary

這些形容詞均含有“首要的，主要的”之意。
chief: 指人時，表同類中職位最高，權力最大；指物時，表同類中最重要，價值最高。
principal: 用於人時，指地位優於其他人；用於物時，指該物在大小、重要性等方面優於他物。
main: 通常只用於物。指在一定範圍內，某物的重要性、體積或力量等超過其它物。
major: 指同其他人或其它物、問題等相比較，顯得更加重要和突出。
leading: 側重指具有影響力或凝聚力。從而有主導和引導的作用。
capital: 著重指因重要性、意義、優越或重大而名列同類之首。
foremost: 側重指在行進或發展過程中居首位。
primary: 通常不用於人。用於物時，指在重要性方面占第一位。

字典網

英文解釋：

名詞 primary:

1. a preliminary election where delegates or nominees are chosen
   同義詞：primary election
2. one of the main flight feathers projecting along the outer edge of a bird's wing
   同義詞：primary feather, primary quill
3. coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit
   同義詞：primary coil, primary winding

形容詞 primary:

1. of first rank or importance or value; direct and immediate rather than secondhand
2. not derived from or reducible to something else; basic
3. most important element
   同義詞：chief, main, principal
4. of or being the essential or basic part
   同義詞：elementary, elemental
5. of primary importance
   同義詞：basal

例句：

1. The demand for primary products is on the increase in European market.
   歐洲市場對初級產品的需求在增長。
2. He only accepted the primary education off and on in his childhood.
   他小時候只斷斷續續地接受過初等教育。
3. Primary education comes under the umbrella of local government.
   國小教育受地方政府的保護。
4. The little boy left primary school at eleven.
   這個小男孩十一歲時國小畢業。
5. The disease is still in its primary stage.
   這疾病仍然在初發階段。
6. Love and hatred are primary emotions.
   愛和恨是基本的情感。