errand
noun [ C ] uk/ˈer.ənd/ us/ˈer.ənd/
（短程）差事;跑腿
a short journey either to take a message or to take or collect something
I'll meet you at six, I've got some errands to do/run first. 我会在6点和你见面，我得先去办些事情。
Idiom
errand of mercyidiom literary 救难扶困之举；雪中送炭
an act of providing or bringing help