"Whistle before you walk into a stranger’s camp" nghĩa là gì?

"Whistle before you walk into a stranger’s camp" = huýt sáo trước khi bước vô trại của người lạ -> nghĩa là cảnh báo nên thận trọng, cẩn thận.

Ví dụ

Whistle before you walk into a stranger’s camp, as it will create noises that attract them.

At night, soldiers had to whistle before walking into a stranger’s camp because it would be a trap (bẫy).

"I'm not a performance artist," she says. "Whistle before you walk into a stranger’s camp for dealing with what already exists."

Bài trước: "Don’t dig up more snakes than you can kill" nghĩa là gì?