华盛顿邮政公司，通过把部分经营项目转向教育，一直竭力规避风险，目前的测试及测试准备服务项目，至少为公司带来了五成的收入。

The Washington Post Company has prevented the trouble only by changing part of its business to education; its testing and test-preparation service now brings in at least half the company's income.

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分析讨论了生产过程中的原料选择、成膜特点及施工要点，测试了所得产物性能。

Raw materials selection, in manufacturing process, film forming characteristics and key operations were analysed and discussed, properties of the products obtained were tested.

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