“不可闻”的英语？

上校微弱的声音几不可闻。The Co-lonel's voice was barely audible.穿过米德尔斯伯勒的那条河变得污秽不堪、臭不可闻。The river that runs through Middlesbrough became ugly on the eye and hard on the nose.我除掉了走廊上这只臭不可闻的捕蝇器啦.I have cleared my piazza of that u...