They were, after all, responsible for about $13 trillion of trade in 2005, and the WTO underpins this success.
毕竟他们在2005年做成了13万亿的国际贸易,而世贸组织是这个成就的基石。
During that time, however, WTO members have not adjusted the maximum levels of tariffs and other barriers that they can maintain on goods and services.