Since then, the white wedding dress has swept the world, and even today is still the most popular girls wedding dress, because it symbolizes purity and fidelity.
自那以后，白色的婚纱风靡全球，即使到今天依旧是最流行的结婚礼服，因为它象征着纯洁和忠诚。
After the most difficult year of his career Nadal himself is still driven by a simple purity of purpose.
在经历了职业生涯最艰难的一年后，纳达尔仍然被一个简单而单纯的目标而驱使。
Established the conception of the efficiency of a pass through molecular distillation amount to the desired purity through several passes through the molecular still.
提出一次分子蒸馏过程相当于一块高效塔板的概念，经过多次蒸馏，馏出物纯度可以达到目标含量。
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