【正文】
但是應(yīng)該理解每一種機(jī)械加工方法的諸多特定方面。 Sentenceanalysis: ? Knowledge of such facts as degree of all roughness obtained by any operation, and the economics of attaining a smoother surface with each operation, will aid the design engineer in deciding just which surface roughness to specify. ? 每種操作所能獲得的表面粗糙度及其成本等方面的知識有助于設(shè)計(jì)工程師確定所需的表面粗糙度。 Thoughts ? 1. What is the secret in the film? ? 2. Do you agree with the secret? Why? (no less than 80 words)