low-rate code

例句：

1. 1. The company uses a low-rate code to ensure data security.
   该公司使用低费率代码以确保数据安全。
2. 2.The low-rate code is only available for users with a certain level of access.
   低费率代码仅对具有特定访问级别的用户可用。
3. 3.The low-rate code is often used in emergency situations where speed is critical.
   低费率代码常用于紧急情况，此时速度至关重要。