M?t s? hi?u ?ng, ch?ng h?n nh? gi?m huy?t áp, ???c nhìn th?y g?n nh? ngay l?p t?c.Encyclopaedia Britannica's editors oversee matter spots through which they've got considerable expertise, irrespective of whether from yrs of experience gained by focusing on that information or via review for a complicated degree. They publish new articles and vali