bend

路上有一个急转弯。

There's a sharp ___bend in the road.

他不得不弯曲金属棒以适应空间。

He had to ___bend the metal bar to fit it into the space.

举起重物时要弯曲膝盖，以避免受伤。

To avoid injury, ___bend your knees when lifting something heavy.