克瑞斯蒂娜教授在许多学生的簇拥下走出了实验室。
Professor Christina walked out of the lab and she was followed by many students。(一般表达法)
(and连接并列句，第二分句的谓语为被动语态。)
Professor Christina walked out of the lab，followed by many students。
(较高表达法)
(不使用并列连词and，留下过去分词短语做伴随情况状语。)
Professor Christina walked out of the lab，with many students following her。(高档表达法)
(with引起的介词短语替代原来的并列句，并以现在分词的主动形式表示伴随情况。)
一旦见到，终生难忘。
Once it is seen, it can never be forgotten。(一般表达法)
(once引起条件状语从句，修饰谓语动词。)
Once seen, it can never be forgotten。(较高表达法)
(将原来的状语从句简化为过去分词短语，表示被动，用做状语。)
省略含蓄法
城市快报考虑如何才能离开那个鬼地方。
Because he was lonely and unhappy, he began to think about how to leave that place。(一般表达法)
(because引起状语从句，修饰谓语动词began。)
Lonely and unhappy, he began to think about how to leave this place。(高档表达法)
(保留状语从句的表语形容词用做状语，句子显得简洁清楚，干净利索。)
又冷又饿(饥寒交迫)，老人倒在地上。
Because he was cold and hungry, the old man fell on the ground。
(一般表达法)
(because引起状语从句，修饰谓语动词fell。)
Cold and hungry, the old man fell on the ground。(较高表达法)
(保留状语从句的表语形容词cold and hungry做状语，修饰谓语动词fell。)