由 marks the agent or source in passive or service descriptions, linking the entity responsible for providing a service or holding a company.
"本站由 阿里云 提供计算与安全服务。"
"由中国电信旗下中电信数智科技有限公司全资持股。"
让…先…— Let firstHSK 3
让 introduces the person who is allowed or caused to do something, and 先 indicates doing it before others or before something else.
"36氪APP让一部分人先看到未来。"
"推送和解读前沿、有料的科技创投资讯。"
在…成立…— Establish locationHSK 4
Use 在 + location + 成立 to specify where an organization, company, or entity was set up.
"中国电信旗下公司在湖南成立数智科技公司。"
"近日，中电信数智科技（湖南）有限公司成立，法定代表人为张伟平。"
居然…— Unexpected resultHSK 4
居然 expresses surprise that something unexpected or contrary to assumptions happens.
"那些消失在朋友圈的 App，居然还没停更。"
"最严 AI 监工，快把汉堡王自己人吓坏了。"
Key Vocabulary
小时xiǎo shíHSK1
CL:個|个[ge4]
的deHSK1
(used after a noun, verb or adjective to form a nominal expression, as in 皮革的[pi2 ge2 de5] "one made of leather" or 跑堂兒的|跑堂儿的[pao3 tang2 r5 de5] "a waiter (literally, one who runs back and forth in a restaurant)" or 新的[xin1 de5] "new one")