by the numbers

介词短语
中文释义

英文释义

介词短语
  1. exactly, precisely, or in a formulaic way. idiomatic

词形变化

by-the-numbers alternative

词源

The origin of this phrase goes back to the American Revolutionary War where a book containing numbered positions for rifle and bayonet practice was used to train soldiers. In the book, each diagram was numbered.
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