gratuitous bailment

例句：

1. 1. The defendant was found guilty of gratuitous bailment.
   被告被认定有罪，因为其行为属于无偿担保。
2. 2. The company's policy states that gratuitous bailment is not allowed.
   公司的政策规定不允许无偿担保。
3. 3. The client requested a gratuitous bailment for their valuable documents.
   客户要求对重要文件进行无偿担保。