d no date
D没有日期
以上为机器翻译结果，长、整句建议使用 人工翻译 。
No research to date has shown a definitive link between vitamin D and the development or progression of MS because it is possible people with MS simply have low vitamin D levels.
WSJ: Swedish Study Links Multiple Sclerosis to Vitamin D Levels
There is no set date for U.S. release so if you want this wrinkle zapper, you'd better book a flight across the pond.
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