Therefore, high-qualityselection of acetylene it is particularly important.
因此，优质乙炔的选用就显得尤为重要。
2
The inefficient qualityselection and welfare levels entail the breaking up oligopoly and introducing competition in China telecommunications industry.
寡头垄断在产品质量选择和定价方面的扭曲，说明了电信行业打破垄断、引入竞争的必要性。
3
Wild Ganoderma: Ganoderma product fields (except the outer spore powder capsule) are high-qualityselection of wild fungus in Yunnan Province as the raw material.