Solar energy is lauded as an inexhaustible fuel source that is pollution and often noise free. The technology is also versatile.
太阳能被称为是取之不尽的能源，没有污染，通常也没有噪声，而且用途广泛。
This technology has the advantages of simple operation, high yield and low cost by using water as solvent which is poisonless and pollution free.
该工艺条件具有操作简单、产量高、无毒无污染、成本低等特点。
Long extension wire technology has extended an accurate, low cost, pollution-free advantage of the good prospects for the development and popularization.
长延期丝技术拥有延期准确、成本低、无污染优点的具有很好的发展前景和推广价值。
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