open sesame

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From the fairy tale Ali Baba and the Forty Thieves , in which the magic words open sesame had to be said to open the cave where the thieves kept their treasure.

源自童话故事《阿里巴巴和四十大盗》。只有念出咒语“芝麻，开门”，大盗藏宝洞的大门才能打开。

something that makes it very easy to achieve a particular thing

(达到…的)法宝，通行手段，开门咒语

A science degree can be an open sesame to a job in almost any field.

理科学位是可以在几乎所有领域获得一份工作的敲门砖。