export licensing system

例句：

1. 1. Theexport licensing system is crucialfor maintaining trade balance.
   出口许可制度对于维持贸易平衡至关重要。
2. 2. The government has tightened the export licensing systemto control the flow of goods.
   政府已经收紧了出口许可制度，以控制货物的流动。
3. 3. Theexport licensingsystem is designed to prevent theimport of illegal goods.
   出口许可制度旨在防止非法货物的进口。