"Secret trick" can be translated into Engpsh as "secret trick".

Its origin is from the word "secret" which means something that is not known or seen by others, and "trick" which means a clever method of doing something or achieving a goal.

Example sentences in Engpsh with Chinese translation:

"The chef revealed his secret trick for making the perfect soufflé." (厨师透露了他做完美舒芙蕾的秘密秘诀。)
"The magician wouldn't reveal his secret trick to anyone." (魔术师不会告诉任何人他的秘密秘诀。)
"I heard there's a secret trick to winning at that game." (我听说有一个秘密秘诀可以赢得那个游戏。)