oc·ca·sion·al·ly /-ˈkeʒnəli, ˈkeʒənḷi/
 (ad.)有時候,偶而
 Oc·ca·sion·al·ly adv. In an occasional manner; on occasion; at times, as convenience requires or opportunity offers; not regularly.
    The one, Wolsey, directly his subject by birth; the other, his subject occasionally by his preferment.   --Fuller.
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 occasionally
      adv : now and then or here and there; "he was arrogant and
            occasionally callous"; "open areas are only
            occasionally interrupted by clumps of trees"; "they
            visit New York on occasion"; "now and again she would
            take her favorite book from the shelf and read to us";
            "as we drove along, the beautiful scenery now and then
            attracted his attention" [syn: on occasion, once in
            a while, now and then, now and again, at times,
            from time to time]