Introduction to Programming and Computer Science - Full Course
freeCodeCamp.org
we would call upon its index.
「"call upon"」—— 听母语者在 YouTube 视频里怎么说
在 2 个 YouTube 视频的字幕中找到了 2 条「"call upon"」的用法。点击任意结果即可听到母语者的真实发音——完全免费，无需注册。
Gondor’s Army Explained in Detail - Middle-Earth Lore DOCUMENTARY
Wizards and Warriors
or steward call upon the fiefs to send a