Though complicated in detail, local taxes are in essence simple.

虽然细节复杂，地方税本质上是简单的。

The two things are the same in outward form but different in essence.

这两样东西外表上相同， 但本质上不同。

In essence, low-carbon economy is efficient usage of energy, development of clean energy and pursuit of green development.

低碳经济实际上就是有效利用能源，发展绿色能源，还有追求绿色发展。

In essence everything has been said.

其实所有事情都已经说过了。

In essence, he proved that atoms exist.

从实质上讲，他证明了原子的存在。