touch the ground是什么意思

touch the ground

[英][t?t ɡraund] [美][t?t i ɡra?nd]

碰触地面;?

双语例句：

Clouds that touch the ground are known as fog.

当云层接触地面，称为雾。

An animal that walks so that only the toes touch the ground as e.g. dogs and cats and horses.

行走时只用脚趾着地的动物，如狗、猫和马。

Don't allow back knee to touch the ground and keep hip, knee and ankle aligned facing forwards.

后膝不应接触地面，并保持髋关节，膝盖和脚踝正面朝前对齐。