videoconferences是videoconference的复数
videoconference
美 ['vɪdioʊ.kɑnf(ə)rəns] 
英 ['vɪdiəʊ.kɒnf(ə)rəns] 
- 网络视频会议;视讯会议;电视会议
 
复数:videoconferences  
n.  | 1. a meeting in which people in different places see and hear each other using electronic equipment, including video screens  |