请结合本节课课程资料自行翻译以下内容。 It is estimated that casting are used in 90% or more of all manufactured goods and in all capital goods machinery used in manufacturing. The diversity in the end use of metal castings is a direct result of the many functional advantages and economic benefits that casting offer compared to other metal forming methods. The beneficial characteristics of a cast component are directly attributable to the inherent versatility of the casting process. Rapid transition to finished product. The casting process involves pouring molten metal into a cavity that is close to the final dimensions of the finished component; therefore, it is the most direct and simplest metal forming method available. Suiting shape and size to function. Metal castings weighting form less than an ounce to hundreds of tons, in almost any shape or degree of complexity, can be produced. If a pattern can be made for the part, it can be cast. Placement of metal for maximum effictiveness. With the casting process, the optimum amount of metal can be placed in the best location for maximum strength, wear resistance, or the enhancement of other properties of the finished part. This, together with the ability to core out unstressed sections, can result in appreciable weight savings. Optimal appearance. Because shape is not restricted to the assembly of preformed pieces, as in welding processes, or governed by the limitations of forging or stamping, the casting process encourages the development of attractive, more readily marketable designs.