Motherhood has both its pros and cons.当妈妈既有好的一面，也有不好的一面。The pros and cons cancel out.正反两种意见抵消.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。...
The same is true of the steppes north of the Black Sea.黑海以北的草原,也是如此.The steppes gave way to forests, and red deer took the place of horse and bison.大草原被森林取而代之, 赤鹿替代了野马和野牛.She was hardened by the rigours of the Siberian s...