pointlessly

例句:

• He spent his life in pointlessly tiresome drudgery.
  他的一生都在做毫无意义的烦人的苦差事.
  
• Chemicals were pointlessly poisoning the soil.
  化学品在无谓地污染着土壤。
  
• It's pointlessly trying to keep your friendship secret — it's common knowledge already.
  你们无须将友情保密——其实已尽人皆知.
  
• Why is unhappy eating the most pointlessly secret of miseries?
  来自WSJ
• But always be wary that you may be spending your money pointlessly.
  来自BBC
• This is a crucial part of its purpose, as it does not lure ants from the nest pointlessly, after a food has gone.
  来自BBC