Volunteers have identified amazingly subtle features in the aerogel collectors.志愿者识别出了气凝胶中令人惊异的细微结构.Q. Why was aerogel used on Stardust?问: 为什么“星辰”要使用气凝胶 呢 ?Next, find the surface of the aerogel.然后, 搜寻气凝胶的表面....
他已经在擦汽车轮毂了。He was already buffing the car's hubs.我在前后轮毂上都抹了润滑油，还调校了刹车。I greased front and rear hubs and adjusted the brakes.轴和轮毂通常用键固定在一起.Shafts and hubs are usually fastened together by means of keys....
他的各种理论被总括在一篇通俗的论文中.His theories have been reduced in a popular treatise.总括起来说, 他这个人有不少突出的优点.To sum up, he is a person with many outstanding qualities.总括而言, 这几步骤使得银行借贷容易了许多.Together, these steps make it easier for banks t...