由于技术和社会允许采用高度有效和普遍可接受的计划生育方法，因此家庭规模有所减少。
As technology and society permit highly effective and generally acceptable methods of family planning there has been a decline in family size.
专业人士掌握着技术方法，但没有掌握他们创造性工作的社会目标。
Professionals control the technical means but not the social goals of their creative work.
我认为，传统技术方法的消亡不一定是坏事，这是社会进步的自然结果。
As for me, the declining of traditional technology and methods is not a bad thing; it is the natural result of progress of society.
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