在课堂上迷路了

just in case───以防万一

cabin class───二等舱；特别二等舱（在一二等舱中间）

go to a class───去上课

levy in mass───大规模征税

looking glass───镜子；窥镜

lost income───收入损失

lower class───下层阶级；下层社会

of today everyone being the same in survival and number of offspring means that natural selection has lost 80% of its power in upper-middle-class India compared to the tribes.───今天这种极其显著的平均化——每个人的生存机会和子女数量都相同——意味着与部落相比较，自然选择在印度中上层已经失去了80%的作用。

island's middle class lost their savings last year (and some their homes), in unregulated investment scams.───投资把戏，岛屿上一些中产阶级去年已无存款(一些无家可归)。

He could afford to smile now when he recalled the solemn Browning class in which he had first lost his heart.───现在他回想起在那讨论诗人布朗宁的严肃课堂上，自己竟然春心萌动，不禁哑然失笑。