I bought a bottle opener yesterday.
我器。
声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。
Teeter-totters, salad tongs, and bottle openers are all levers, meaning that a downward force exerted on one end can be transferred and increased in an upward direction at the other end, allowing a small force to lift a heavy weight.
跷跷板、沙拉钳和开瓶都杠杆,表明在一端施加的向下的力,可以在另一端向上转移并增加,从而用很小的力就能举起重物。