重點講解：
1. speaking of (接過話頭引入新話題)說到…，談到…；
例句：Speaking of tennis, Daniel is the best.
說起網球，丹尼爾才是最棒的Kq@8uZZrR^UyOaf^]。
2. in reality 事實上；實際上；
例句：In reality adding a little oxygen to the bath is very good for the body.
事實上增加一些氧氣到沐浴中，是對身體非常好的1CxfXoy!1Mi#o。
3. in the middle of (某件事或某段時間的)中期；
例句：I woke up in the middle of the night and could hear a tapping on the window.
我半夜里醒來，聽見有敲窗戶的聲音a7)E^O&DAG_5Q8)Ix[。
4. far away from 遠；遙遠地；
例句：When he picked up a lighthouse on the hilltop, he knew he was not far away from his home.
當他看到山頂上的燈塔時，他知道他離家不遠了%7X0FE08W+。