All conference attendees will receive a gratis lunch voucher at the registration desk.

所有與會者都會在報到處領到一張免費午餐券。

The hotel offers gratis airport shuttle service to guests staying three nights or more.

飯店為住宿三晚以上的旅客提供免費機場接駁服務。

As an apology for the delay, the store shipped the replacement part gratis.

為了表達延遲的歉意，該商店免費寄送了替換零件。