网址

wǎng zhǐ website; web address; URL

：bt55net ag 正规

zhèng guī regular; according to standards

平台

píng tái platform; terrace; flat-roofed building

有

yǒu to have; there is; there are; to exist; to be

哪些

nǎ xiē which ones?; who?; what?

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