摘要：
This video came out on Earth Day a few years ago . Earth Day. ... Earth Day is an annual event celebrated around the world on April 22 to demonstrate 阅读全文
摘要：
1. 中文 8:20am ～ 8:50am https://zoom.us/j/2758245771 密码：2020 2. IT 9:20am ～ 9:50am https://zoom.us/j/5744747369 密码：computing 3. English 10:40am ～ 11:10a 阅读全文