trifle

• 犯不着为这点小事生气。

  It is not worth getting angry over a small matter like this.

• 这点小事不值得一提。

  This matter is too small to be worth mentioning.

• 一点点小事耽误了大事

  one tiny matter got in the way of the main task

• 从小事做起

  start small

• 做无谓的小事

  do small meaningless actions

• 这对他来说是小事一桩，半个小时就能办成。

  This is nothing to him – he'll finish it in half an hour.