重点讲解：
1. count down 倒数；
The people at control have already begun to count down.
控制站的人员已经开始倒数秒数了NJme#Ej=w@aNLT^HA。
2. learn from （从…中）吸取（教训）；
I am convinced that he has learned from his mistakes.
我深信他已从错误中吸取了教训3DZ;Xjzdy]*^LA。
3. lead to 招致；致使；导致；
A poor diet will ultimately lead to illness.
糟糕的饮食终将导致疾病(Pfs)bZRlsj=e!。
4. in order to 为了；以便；目的在于；
They work long hours in order to take home a fat wage packet.
为了多赚点儿工资，他们加班加点地工作O#)u!NOg~38O(T。