secret

The two government agents met at a secret location in the middle of the desert.

(Chinese) 两名政府特工在沙漠中心的秘密地点会面。

She kept a secret diary hidden under her mattress for many years.

(Chinese) 多年来，她一直把一本秘密日记藏在床垫下面。

The chef refused to reveal the secret ingredient in his famous tomato sauce.

(Chinese) 大厨拒绝透露他著名的番茄酱里的秘密配方。

Hard work and persistence are the real secrets to achieving long-term success.

(Chinese) 勤奋和坚持是获得长期成功的真正秘诀。