regarding
UK [rɪ'gɑ:.dɪŋ] US [-'gɑ:r-] formal
preposition
 IMPROVER 
■about 关于；至于
•The company is being questioned regarding its employment policy.该公司的用人政策正受到质疑。
UK [rɪ'gɑ:.dɪŋ] US [-'gɑ:r-] formal
preposition
  Common Learner Errors   regardingRemember that regarding is never followed by 'to'.Don't say 'regarding to something', say regarding something :
✗ I am writing regarding to your letter of May 31st.I am writing regarding your letter of May 31st.