形容词
中文翻译：替代的
同义词：
['substitutable', 'replaceable']
例句：
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1. The substitute teacher was able to cover for the absent one.
替补老师能够代替缺席的老师。
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2. The new technology is substitutive of the old one.
新技术是旧技术的替代品。
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3. Substitutes are used when the original product is not available.
当原产品不可用时，使用替代品。