as good as gold
/əz ˌɡʊd əz ˈɡəʊld/
Nghĩa thường dùng
(trẻ con) rất ngoan, ngoan ngoãn
thành ngữ
“The baby was as good as gold during the whole flight to Da Nang.”Em bé rất ngoan suốt chuyến bay tới Đà Nẵng.