When I invested my money with the company I was told it was as safe as the Rock of Gibraltar.

我投资这家公司时，他们说它像直布罗陀巨岩一样可靠。

《牛津词典》

You're a bit like the rock of Gibraltar.

你有点像直布罗陀的岩石。

youdao

The Rock of Gibraltar is honeycombed with caves.

直布罗陀岩山上有许多洞穴。

youdao

"A lot of people come here expecting the Rock of Gibraltar, " she said.

NPR: Unearthing History in 'A Voyage Long and Strange'

By the mid-twentieth century, the mutual insurance industry had become the Rock of Gibraltar in the financial lives of millions of Americans.

FORBES: Retirement Disaster Looms For Universal Life Policyholders

They clamored for a special prosecutor, despite the First Amendment implications. (That this particular individual worked for the CIA was hardly a Beltway secret.) Novak's reputation survived like the Rock of Gibraltar.

FORBES: Prince of Enlightenment