你可以在超市使用自助结账机。

You can use the ___self ___service checkout at the supermarket.

我昨天在一家自助餐厅吃了午餐。

I had lunch at a ___self ___service restaurant yesterday.

这个加油站是自助式的，所以你需要自己加油。

This gas station is ___self ___service, so you need to pump your own gas.