from scratch

US /frəm skræʧ/
UK /frəm skræʧ/
"from scratch" picture
1.

從零開始, 從頭開始

from the very beginning, without any prior preparation or advantage

:
We had to build the entire system from scratch.
我們不得不從零開始構建整個系統。
She learned to cook from scratch, without using any pre-made ingredients.
她學會了從頭開始烹飪,不使用任何預製食材。