The tax collection system in low-income economies also tends to be less efficient, which in turn makes generating revenue harder.

低收入经济体的税收制度也往往效率较低，这反过来又使创收变得更加困难。

After Osman's death his son Orhan established a sophisticated military organization and tax collection system geared towards funding quick territorial expansion.

奥斯曼死后，他的儿子奥尔罕建立了一个复杂的军事组织和税收系统，旨在资助快速的领土扩张。