1. The software system consists of the data base subsystem, model base subsystem, graph base subsystem, method base subsystem, help base subsystem &man-machine interface.
该软件系统由数据库子系统、模型库子系统、图形库子系统、方法库子系统以及帮助系统和人机界面组成。
2. The present paper describes the development of various new materials, including copper base, iron base, cast iron fibre base, cast iron powder base, metal-glass materials, etc.
本文叙述各种新材料的发展，包括铜基、铁基、铸铁纤维基、铸铁粉末基以及金属-玻璃材料等。
3. Milling operations are employed in producing flat, contoured and helical surfaces as well as for thread-cutting and gear-cutting operations.
铣削操作主要用来加工平面轮廓和螺旋面以及螺纹加工和齿轮的切削。
4. As you might guess, Arithmetic operations are the fundamental math operations : addition , subtraction , multiplication , and division.
正如您所猜测的，算术运算是基本的数学操作：加法、减法、乘法和除法。
5. Keep asynchronous operations short. Do not equate asynchronous calls with lengthy operations.
保持异步调用操作简短。不要把异步调用和冗长的操作混淆。
