twenty-nine. Please don't hesitate to…

29. 请随时……

Please don't hesitate to call me if you need help.

需要帮忙的时候，请随时打电话给我。

Please don't hesitate to ask me if you don't understand.

不明白的时候，请随时问我。

Please don't hesitate to contact us if you need more about our product.

如果你还需要我们的产品，请随时联系我们。

Please don't hesitate to call the police if the man attacks you again.

那个人如果再侵犯你的话，请随时报警。