以及

以及 is a conjunction used to connect items in a list, often adding an additional element or emphasizing the inclusion of something beyond what has already been mentioned. It is similar to 'and also' or 'as well as' in English, but it is more formal and commonly used in written Chinese.

The character 以 (yǐ) originally meant 'to use' or 'by means of,' while 及 (jí) means 'to reach' or 'to arrive at.' Together, 以及 conveys the idea of 'reaching up to' or 'including,' which evolved into the meaning of 'and also' or 'as well as.'

在正式或书面语中，以及常用于列举多个事物，强调补充内容。例如：这本书不仅有中文，还有英文和日文。它还包含一些练习题和参考答案。在日常对话中，人们更倾向于使用“还有”或“还有其他”，但 以及 更加正式和书面化。