重点讲解：
1. pros and cons
利弊；优缺点；
eg. They sat for hours debating the pros and cons of setting up their own firm...
他们在一起坐了数小时，讨论自己创办公司的利弊o)*.ry1X]#aMLQeI。
eg. Motherhood has both its pros and cons.
当妈妈既有好的一面，也有不好的一面k0Z8[|cJvkF=tC,Ifd。
2. lack of
缺乏；不足；没有；
eg. There is a lack of people wanting to start up new businesses.
有创业意愿的人非常匮乏JrfMa_hP74B2.。
eg. He felt tired for lack of sleep.
他因缺少睡眠而感到疲劳8;-3gWc6M^ym。
3. confine to
限制，限定；
eg. Judges may be trained to confine themselves to the legally relevant facts before them.
法官接受的训练是将自己限制在面前的法律事实范围内e9*x=J[EdiKdC(uGH。
eg. Wild animals are confined to cages.
野生动物被关在笼子里AHJDPfWJaBPo。