unfastened unsealed开着的
The buttons came unfastened扣子松开了
Bundle becoming unfastened捆扎不紧
he unfastened the door他解开门;他打开了门;正在翻译
The Unfastened Heart书名
V-T（及物动词） If you unfasten something that is closed, tied, or held together, or if you unfasten the thing holding it, you loosen or remove the thing holding it. 解开
When Ted was six we decided that he needed to know how to fasten and unfasten his seat belt.
泰德六岁时，我们决定让他知道怎样系和解他的安全带。