Radical:

meaning for chá:

  • - to research
  • - to check
  • - to investigate
  • - to examine
  • - to refer to
  • - to look up (e.g. a word in a dictionary)

meaning for zhā:

  • - see 山查
  • - surname Zha

wǒmen我们
xūyào需要
chá
yíxià一下
de
bèijǐng背景
zīliào资料

We need to check his background.