1 我认为向他求助是不现实的。事实上，他自己也需要帮助。I dont thank its realistic to turn to him for help.As a matter of fact,he himself is in need of help.2 越来越多的人正在意识到与空气污染作斗争的迫切需要。More and more people are being awakend to the urgent need of combating with air pollution.3 有明显的迹象表明一些古老的传统和价值观念不再被年轻人珍视。There are visible signs that some of the time-honored old traditions and values are no longer cherished by the young people.4 我们许多人觉得宇宙无限这一概念难以立解。Many of us find the notion of a boundless universe hard to gr
