A-12：a sly dog 行为阴险的人
A: We should keep Frank at arm's length.
A: 我们应离富兰克远一点。
B: Yeah.He's known as a sly dog.He's done many people in.
B：是的，他很狡猾，经常陷害别人。
A: He hits below the belt.
A: 也经常暗箭伤人。
B: And he may cash in on people whenever chances are provided.
B：他有机会就占别人便宜。
