1. To do his job Einstein needed only a pencil and a pad of pa-per. 为了做他的工作，爱因斯坦只需要一支铅笔和一本拍纸簿。
2. It introduces design means of PROFIBUS-PA fieldbus control system, and provides hardware and software based on bus system. 本文介绍了PROFIBUS-PA现场总线的控制系统设计方法，给出了其硬件及软件实现。
3. The experiments show that the formulas set up in this pa per can lower the deformation of non-symmetry extruded sections efficiently. 实验证明利用本文提出的计算式进行模具设计能有效地减小挤压非对称型材的弯扭畸变。
英英解释
n.
1. an informal term for a father; probably derived from baby talk
2. a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and
3. a unit of pressure equal to one newton per square meter
4. a Mid-Atlantic state; one of the original 13 colonies
5. an electronic amplification system used as a communication system in public areas
