回複：波老師能不能講講英語，教一下可以說些什麽？

Well, it’ll be hard for me to provide any helpful advice for this particular case since it is circumstantial. However, it looks unlikely that their sales force would prefer external contractors to their internal resources unless they had to. It is imperative for any sales or application engineer to proactively support the frontline sales who brings back the business. Nevertheless, for English learning and career development, it might be worth having a look at  英語學習 where you may find something useful.