Key: yào shi.

Interpretation:

1. An implement for opening a lock.

Citation: Bing Xin, "Superman": "Go and tidy up that empty room and lock the door again, the key is on the door!"

2. Metaphorically, it refers to those who rely on the management of affairs.

Citation: "Dream of Red Mansions" (红楼梦)第三九回："You are your grandmother's master key."

3. Metaphorically, it refers to the method or means to open the doorway.

Citation: Shatin, "Breaking Through the Gate," 4: " Zuo Jia got an inspiration and envisioned that he had found the key to unlocking the secret."

1, He groped in the darkness for half a day before he found the key.

2, Diligence is the key to unlocking the treasury of knowledge.

3, You were so negligent that you didn't realize that you had stuck the key in the door lock.

4. If you forget to bring the key, it will be bad.

5. If I were a key, I would open all the knots in people's hearts.

6, Linlin went to the carport to push the bike, but a pocket, the car keys are missing, anxious he hoe strong and weak.