inversion base

例句：

1. 1. The inversion base of the car is what allows it to turn.
   汽车的倒置基础允许它转向。
2. 2.In some cases, a scientist may need to invert the base of a sentence to make it grammatically correct.
   在某些情况下，科学家可能需要颠倒句子的基础使其语法正确。
3. 3. The inverted base of the building is visible from the street.
   这座建筑的倒置基础从街道上可见。