7.19

今日长难句

The explanation for insensitivity to smell seems to be that the brain finds it inefficient to keep all smell receptors working all the time but can create new receptors if necessary.（完形，2005）

explanation / ˌekspləˈneiʃn / n.解释；说明

insensitivity / inˌsensəˈtivəti / n.不灵敏性

inefficient / ˌiniˈfiʃnt / adj.效率低的

receptor / riˈseptə(r) / n.感受器；受体

结构分析（图片点击可放大）

翻译

（人类鼻子）对气味不敏感的原因似乎是这样：大脑发现让所有的气味感受器一直工作效率太低，不过可以在必要时产生新的感受器。

预告明日长难句

However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behaviour became markedly different.（Text1，2005）