free基本解释
adj,[经]免费的；自由的，不受约束的；[化学]游离的,同近
Admission is free for children under 9..九岁以下儿童免费入场。
免费的；自由的，不受约束的；[化学] 游离的英释中释adjsomething that is free does not cost you any money
for free,免费.短语
