把这一句，留给此刻的你
We shall probably never attain the power of measuring the velocity of nervous action; for we have not the opportunity of comparing its propagation through immense space, as we have in the case of light.
我们也许永远无法达到测量神经活动速度的能力;因为我们没有机会比较它在广阔空间中的传播，就像我们在光的例子中所做的那样。