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add-on

adj. 附加

形容词：add'-in'

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a component that is added to something to improve it
[同] improver, addition, add-on
[例]
- the addition of a bathroom was a major improvement
- the addition of cinnamon improved the flavor
a supplementary component that improves capability
[同] accessory, add-on, appurtenance, supplement

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some fertility specialists say they are hopeful that this relatively inexpensive and simple treatment might ultimately prove to be a useful add-on to traditional methods.查看全文
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