hold the key
US /hoʊld ðə kiː/
UK /hoʊld ðə kiː/

1.
掌握關鍵, 擁有解決辦法
to have the power or control over something; to have the solution to a problem
:
•
The new technology might hold the key to solving the energy crisis.
這項新技術可能掌握著解決能源危機的關鍵。
•
The CEO alone holds the key to the company's future decisions.
只有首席執行官才掌握著公司未來決策的關鍵。