High-speed trading, now estimate d to account for about two-thirds of U. S. stock market volume , takes many forms, some entirely proper.
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some entirely proper
有些是完全正确的
以上为机器翻译结果，长、整句建议使用 人工翻译 。
While some are helpful, supplements can't entirely replace proper nutrition, said Roberta Anding, an American Dietetic Association spokesperson.
补品确实有些帮助，但不能完全替代生命所需要的营养，美国膳食协会发言人罗博塔·安丁如是说。
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