1.nervous system 神经系统

例句：They recorded the action of the drug on the nervous system.
他们记录了药物对神经系统的作用Cn!)r,*QV[。

2.spinal cord 脊髓

例句：That's the three layers of tissue that surround the brain and spinal cord.
我是指包围着大脑和脊髓的三层组织Zo%nER.w;wHwCOwvu4x。

3.define as 定义为

例句：All of these we may define as our needs.
所有这一切，我们都可将其确定为必需品FVeu3diS(9DNxo。

4.build up 加强，建立

例句：During the summer holidays,traffic builds up along the roads to the coast.
每到暑假，在去海滨的路上车辆就拥挤起来_=[p_n*pZBVb&YIkkjy。