1、The convention center was filled with conventioners from all over the world.
会议中心里坐满了来自世界各地的参会者。

2、As a seasoned conventioner, she knew exactly how to navigate the crowded halls and find the best sessions to attend.
作为一个经验丰富的参会者，她清楚如何穿越拥挤的大厅，寻找最好的会议场次。