'add on' 的定义
add on 的趋势
偶尔使用。在柯林斯辞典中， add-on 是3万个最常用词之一。
add on 的翻译
英式英语: add-on NOUN
An add-on is an extra piece of equipment that can be added to a larger one in order to improve its performance or usefulness.
Speakers are sold as add-ons for personal stereos.
add on 的定义—— 柯林斯 英语词典
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