重点讲解：
1. speaking of (接过话头引入新话题)说到…，谈到…；
例句：Speaking of tennis, Daniel is the best.
说起网球，丹尼尔才是最棒的sox-b132c2HH.=。
2. in reality 事实上；实际上；
例句：In reality adding a little oxygen to the bath is very good for the body.
事实上增加一些氧气到沐浴中，是对身体非常好的JgA]f+v^s9M。
3. in the middle of (某件事或某段时间的)中期；
例句：I woke up in the middle of the night and could hear a tapping on the window.
我半夜里醒来，听见有敲窗户的声音ggvQJU5E&6G(hIvYHr*7。
4. far away from 远；遥远地；
例句：When he picked up a lighthouse on the hilltop, he knew he was not far away from his home.
当他看到山顶上的灯塔时，他知道他离家不远了o,WiuIKCbETr[p[。