n.[C]

1. 鑰匙
2. 圖例；題解
3. （解決問題的）線索；祕訣；答案
   The detective believes the missing gun is the key to the mystery.

   那偵探認為那把丟失的槍是偵破這宗疑案的線索。

4. （鋼琴，打字機等的）鍵
5. 【音】調
   The song is written in the key of D.

   這首歌是用D調譜寫的。

6. 關鍵，要害；關鍵人物
   The quarterback was the key of their team.

   那四分後衛是他們隊的靈魂人物。

   This is the key to world peace.

   這是世界和平的關鍵。

vt.

1. 鎖上；插上
2. 【音】為……調音
   The musicians keyed their instruments just before the concert began.

   樂師們在音樂會快開始前為樂器調了音。

3. 用鍵盤輸入（信息等）[（+in/into）]

a.

1. 重要的，基本的，關鍵的[B]
   Self-confidence is the key factor in any successful career.

   自信是任何成功之道的關鍵因素。

n.

1. a small piece of shaped metal with incisions cut to fit the wards of a particular lock, which is inserted into the lock and rotated to open or close it or to operate a switch.
   ▸an instrument for grasping and turning a screw, peg, or nut.
   ▸a pin, bolt, or wedge inserted into a hole or between parts so as to lock the parts together.
2. a lever depressed by the finger in playing an instrument such as the organ, piano, flute, or concertina.
3. each of several buttons on a panel for operating a typewriter, word processor, or computer terminal.
4. a lever operating a mechanical device for making or breaking an electric circuit.
5. a thing that provides access to or understanding of something:
   a key to success.
   ▸an explanatory list of symbols used in a map or table.
   ▸a set of answers to exercises or problems.
   ▸a word or system for solving a cipher or code.
   ▸the first move in the solution of a chess problem.
6. Music  a group of notes based on a particular note and comprising a scale, regarded as forming the tonal basis of a passage of music.
   ▸the tone or pitch of someone's voice.
7. the dry winged fruit of an ash, maple, or sycamore; a samara.
8. roughness on a surface, provided to assist adhesion of plaster or other material.
9. Basketball  the keyhole-shaped area marked on the court near each basket.

adj.

v.

1. enter or operate on (data) by means of a computer keyboard.
2. fasten into position with a pin, wedge, or bolt.
3. (key to) chiefly N. Amer. link with.
   ▸ (key into/in with) be connected or in harmony with.
4. (be keyed up) be nervous, tense, or excited.
5. roughen (a surface) to assist adhesion of plaster or other material.

n.

[名]

1. ①鑰匙。
   키를 찾다.

   找鑰匙。

2. ②關鍵。
   이 문제 해결의 키는 너한테 달려있다.

   解決這個問題的關鍵取決於你。

3. ③（電腦）鍵盤。
4. ④（琴）鍵。