重点讲解：

1.flow off流下；断开
In the middle latitudes of the planet's southern hemisphere, water appears to flow off the edges of craters.
在火星南半球的中纬度地区，似乎有水在火山口的边缘流动过MRI;RvUXDq@k1xc#WP。

2.rip off坑骗

The Consumer Federation claims banks are ripping you off by not passing along savings on interest rates...
消费者联盟声称银行在坑骗客户，因为它们没有把从利率上节省下的钱拿来进行反馈P.GsYg#,!AqM3,a1P。