A：We should keep Frank at arm's length.
我们应该里Frank远点儿。
B：Yeah. He's known as a sly dog. He's done many people in.
是的，他很狡猾，经常陷害他人。
A：He hits below the belt.
他经常暗箭伤人。
B：And he may cash in on people whenever chances are provided.
他有机会就占人便宜。