la·dy·bug /ˈlediˌbʌg/
  瓢蟲
  La·dy·bug n. Zool. Same as Ladybird.
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  ladybug
       n : small round bright-colored and spotted beetle that usually
           feeds on aphids and other insect pests [syn: ladybeetle,
            lady beetle, ladybird, ladybird beetle]