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。

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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。

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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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And, at least in private, these distinctions are still strong: not only a different language, but arranged marriages and strict laws of purity.

ECONOMIST: Gypsies in America