我今晨坐在窗前,世界如一个过路人似的,停留了一会儿,向我点点头又走过去了。
Hard work, under the old system, meant long hours, little rest, and poor pay. Under the new system, it means a fair day's work for a fair day's pay.
介导疼痛的分子非常古老,揭示了这种感觉在进化中的深远根源。