be (as) good as gold idiom
（儿童）乖，守规矩
(of a child) to behave very well
She's been as good as gold all morning. 她一上午都很乖。
| 单词 | be (as) good as gold |
| 释义 | be (as) good as gold idiom （儿童）乖，守规矩 (of a child) to behave very well She's been as good as gold all morning. 她一上午都很乖。 |
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