以'back'为开头或结尾的单词 - 通常与背部有关或以'back'为基础。
Her determination became the backbone of the movement.
His background in engineering helped on the project.
She packed her textbooks into a backpack before leaving.
The advertising campaign backfired and cost them customers.
When he realized the error, he had to backtrack and fix it.
The policy change provoked a widespread backlash.
After years away, the actor made a successful comeback.
The car's design is a throwback to the 1950s.
If you make a mistake, press backspace to erase it.
He took a backward step when the loud noise startled him.