一个信用证只能转让一次。但是，如果允许分批装运，信用证可以同时转让给多个受益人。如果信用证上没有明确规定是否可以转让，应视为不可转让信用证，其受益人必须根据信用证的规定供应货物并准备有关的单据。
【正确答案】：A credit can be transferred only once. But transferring a credit to more than one party at the same time is allowed provided partial shipments are permitted. If a credit does not specify whether it is transferable, it should be regarded as a non-transferable documents according to the credit stipulations.
【题目解析】：参见教材P166。
