He once emerged from the toilets with his flies unfastened.有一次他裤链没拉就出了厕所。The buttons came unfastened.扣子松开了.He unfastened the buttons of his shirt.他解开了衬衣纽扣....

The lid won't come off accidentally , it's been fastened on.盖子不会掉下来, 装得很牢.All deck fittings, windows, hatches and doors had been fastened.甲板上所有的装置、窗户、舱口盖和门都已经关牢了。I shut the door and fastened the bolt.我关上门, 拴上插销...

All deck fittings, windows, hatches and doors had been fastened.甲板上所有的装置、窗户、舱口盖和门都已经关牢了。She fastened the belt loosely around her waist.她把皮带松松地系在腰上。He fastened the dog to the post with a thong.他用一根皮带把狗拴到柱子上....

He unfastened the buttons of his shirt.他解开了衬衣纽扣.He once emerged from the toilets with his flies unfastened.有一次他裤链没拉就出了厕所。The buttons came unfastened.扣子松开了.Reaching down, he unfastened the latch on the gate...他伸手打开了门闩。...

fastened的音标：...

unfastened的音标：...

v.解开（尤指衣服或带子）( unfasten的过去式和过去分词 )，松开，解开，脱开，松开...

v.（使两物）系牢( fasten的过去式和过去分词 )，系紧，使牢固，（使）关紧...