名词
中文翻译：Unknown
同义词：
['substitute', 'alternative', 'substitute', 'alternate']
例句：
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1. Theteacher asked the students to use chalk as a substitute for pens during the test.
老师要求学生们在考试时用粉笔代替钢笔。
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2. They decided to switch from using paper to using digital alternatives for their presentations.
他们决定从使用纸张转向使用数字替代品来展示他们的演示文稿。
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3. The company offered two suppletive alternants for the new product: one with a smaller screen and one with a larger one.
公司为新产品提供了两种替代方案：一种屏幕较小，另一种屏幕较大。