Optional extras
[化] 任选附件
🧩 词语组成解析
[计] 附加设备, 额外设备
🗣️ 情景例句
I am interested in baseball.
我对棒球有兴趣。
What flights do you have from New York to London tomorrow?
明天从纽约飞往伦敦的有哪几班机？
It's a very old castle. It is the oldest one in Britain.
这个城堡很古老，它是英国最老的了。