重點講解：
1. for instance 例如；譬如；
You cannot rely on her, for instance, she arrived an hour late for an important meeting yesterday.
她這人靠不住，例如昨天一個重要會議，她竟遲到了一個小時。
2. step up 增加(數量等)；提高(速度、強度等)；
Government reforms to gas pricing models for exploration and production companies have encouraged them to step up their activities.
政府對勘探及生產企業天然氣定價模式的改革，鼓勵了這些企業加緊勘探及生產活動。
3 a series of 一連串；一系列；連續；接連；
The students have put forward a series of questions.
學生們提出了一系列問題。
4. search for 搜尋；搜索；搜查；尋求；
The police cordoned off the railway station to search for the escaped prisoner.
警察在車站戒嚴，搜捕逃犯。