gratis
例子
The musician performed a special concert gratis for the local charity event.
音乐家为当地慈善活动免费举办了一场特别音乐会。
gratis
例子
The magazine sent her a gratis copy of the latest issue as a gesture of appreciation.
杂志给她寄了一份最新一期的免费副本，以示感谢。
