er·rand /ˈɛrənd/
差使,差事,跑腿,當差
Er·rand n. A special business intrusted to a messenger; something to be told or done by one sent somewhere for the purpose; often, a verbal message; a commission; as, the servant was sent on an errand; to do an errand. Also, one's purpose in going anywhere.
I have a secret errand to thee, O king. --Judg. iii. 19.
I will not eat till I have told mine errand. --Gen. xxiv. 33.
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errand
n : a short trip that is taken in the performance of a necessary
task or mission