四六级 嗯，六级难度果然比四级高不少，这是其中一个翻译题的参考答案：
After nearly twenty years of development, Yangshan Port has achieved automation. The use of digital technology and artificial intelligence has significantly reduced labor costs and carbon emissions. The independently developed terminal management system allows large equipment to be remotely operated from a distance of over 100 kilometers. Yangshan Port appears busy, yet no manual operations can be seen on site, and it can operate continuously 24 hours a day.
