“Safe as Granny’s snuffbox” nghĩa là gì?

“Safe as Granny’s snuffbox” = như hộp đựng thuốc lá của bà -> nghĩa là rất chắc chắn, an toàn.

Ví dụ

It's safe as Granny’s snuffbox, unlike so many of its entry-level competitors, which makes it that much more portable.

It's safe as Granny’s snuffbox. It doesn't stand out in a lot of ways, but it does the job of presenting a fun new flavor that doesn't try to do too much.

So, we tracked every dime we spent. And we basically looked at, OK, here's what it is today, we know what it is today, it's grounded, it's safe as Granny’s snuffbox.

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