garbage
noun [ U ] uk/ˈɡɑː.bɪdʒ/ us/ˈɡɑːr.bɪdʒ/
B1 US (also trash); (UK rubbish)垃圾，废物
waste material or unwanted things that you throw away
废话；无聊的话；无价值的东西
nonsense or stupid ideas
He talks a lot of garbage about education. 他废话连篇地大谈自己对教育的看法。
Idiom
garbage in, garbage outidiom mainly US saying 垃圾进，垃圾出（意为用劣质的材料生产出的产品也必然是劣质的）
something you say that means that something produced from materials of low quality will also be of low quality
The meals are pretty poor but then they never use fresh ingredients - garbage in, garbage out. 这饭真难吃，因为他们从来不用新鲜材料——也难怪，垃圾进，垃圾出。