打开

dǎ kāi to open; to show (a ticket); to turn on; to switch on

：bb77net e 世博

Shì bó abbr. for 世界博覽會|世界博览会[Shi4 jie4 Bo2 lan3 hui4], World Expo

线上

xiàn shàng online

注册

zhù cè to register; to enroll

平台

píng tái platform; terrace; flat-roofed building

介绍

jiè shào to introduce (sb to sb); to give a presentation; to present (sb for a job etc); introduction