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討論內容： In tens, please (ten pound notes) http://www.thepennyloafers.com/portfolio/amanda-triglia/ purchase sildenafil citrate "Comments can be bad for science. That's why…we're shutting them off," the online content editor, Suzanne LaBarre, wrote on Sept. 21. "It wasn't a decision we made lightly. As the news arm of a 141-year-old science and technology magazine, we are as committed to fostering lively, intellectual debate as we are to spreading the word of science far and wide. The problem is when trolls and spambots overwhelm the former, diminishing our ability to do the latter.

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