Now, a lesion that looks like leukoplakia, but isn't, is an area of frictional keratosis.
如图是一种看起腔黏膜白斑,但其实不是的病损——擦性角化。
The implication is that such unemployment as exists at any time is due wholly to the fact that changes in demand conditions are continually taking place and that frictional resistances prevent the appropriate wage adjustments from being made instantaneously'.
这意味着任何时候都存在的这种失业完全是由于需求条件不断发生变化以及擦阻力阻止立即进行适当的工资调整这一事实造成的。