duly
🇺🇸
/ˈduːli/
🇬🇧
/ˈdjuːli/
in the proper way
The form was duly filled out and submitted on time.
表格已按规定方式填写并按时提交。
at the right time
The package was duly delivered at 10 AM as promised.
包裹如约在上午10点准时送达。