practical standard cost

例句：

1. 1. The project is practical because itmeets the needs of the community.
   这个项目是实用的，因为它满足了社区的需求。
2. 2. The manager's suggestion was practical and easy toimplement.
   经理的建议是实用的，且易于实施。
3. 3. The newpolicy is practical for small businessesthat need to save money on taxes.
   新政策对需要节省税收的小企业来说是实用的。