in a way that is not needed or wanted, or more than is needed or wanted: We don't want to alarm people unnecessarily, but they should be aware of potential dangers.
adverb [方式副词]不必要地;多余地
She insists that it's exposing workers to unnecessarily high doses of radiation. 她坚称,这正让工人们暴露在不必要的高剂量辐射下。