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backward and forward
01
彻底地, 全面地
in a manner that includes all necessary parts, elements, or aspects of something
Dialect
American
American
Idiom
Example
After years of studying the language, she understands French literature backward and forward.
经过多年的语言学习，她对法国文学了解得彻底地、全面地。
He is familiar with the financial market backwards and forwards, so he can predict trends accurately.
他对金融市场了解得彻底、全面，因此能够准确预测趋势。
02
in both directions repeatedly
Example
She paced backward and forward, deep in thought.
The swing moved backward and forward in the breeze.
