Having already been through a few shellings , they were much braver now .

他们有了几次的经验，胆子也大多了。

Here we get the true feeling of senseless mechanised slaughter , the terror of artillery shellings and poison gas that , supported by rail systems and industrial economies , could go on and on until minds broke , and the numbing degradation of life in the trenches .

这里我们能体验到毫无意义的机械化屠杀的真实感受，铁路系统和工业经济的支持下炮兵炮击和毒气战的恐怖，这些一直持续下去，直到人变得脑残，生命在战壕中麻木地退化。