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。...
频率多边形比直方图更简单.The frequency polygon is simpler than its histogram counterpart.这个多边形的周长是多少?What is the perimeter of this polygon?只能为任意多边形对象访问此成员.This member can only be accessed for a freeform object....
Enclosed herewith is a twenty - fen stamp.随函附上20分邮票一张.For the payments I inclose herewith P . O . money order.为支付货款,同函附上邮局汇票.Please find two samples enclosed herewith.寄上样品两种,请查收.I return herewith your papers.我随信退还你的文件。I ...