从不同的角度描述同一事物，例如，自学teach oneself;远程教育 distanct、learning。再如：

In his 1776 work The Wealth of Nations，Scottish economist Adam Smilh proposed that specialization in production leads to increased output. 苏格兰经济学家亚当▪斯密在其1776年所著的《国富论》中认为，专业化生产会引起产出增加。

这里，把“生产的专业化”转变为“专业化生产”，把“增加的产出”转变为“产出增加”。

FDA publishes GUIDANCE TO INDUSTRY for the first time. This guidance, "Procedures for the Appraisal of the Toxicity of Chemicals in Food, ”came to be known as the "black book." FDA首次发布《产业指导》。该指导题目为 “食品中化学制剂毒性的评估程序”，人们习惯称之为“黑皮书”。

这里把被动转变为主动。

“正话反说，反话正说”也属于视角变换：

In 1954, MILLER PESTICIDE AMENDMENT spells out procedures for setting safety limits for pesticide residues on raw agricultural commodities. 1954 年，《米勒杀虫剂修正案》详细规定了制定未加工农产品杀虫剂残留标准的程序。

The bill was defeated, but during the next 25 years more than 100 food and drug bills were introduced in Congress. 虽然议案未获通过，但在随后的25年中，有多个食品与药物法案被提交到国会。