either
🇺🇸
/ˈiːðər/
🇬🇧
/ˈaɪðə(r)/
one of two choices, both are okay
You can choose either book to read.
你可以選擇任意一本書來讀。
both of two things
There were trees on either side of the road.
道路的兩邊都有樹。
also, in the same way (used with 'not')
I don't like coffee, and I don't like tea either.
我不喜歡咖啡,也不喜歡茶。
shows a choice between two options
You can either stay home or come with us.
你可以選擇待在家裡,或者跟我們一起走。
adds more information to what was said
The food was good, and it wasn't expensive either.
食物很好吃,而且也不貴。