楼主的例子This book is cheaper than that one.是指这本书比那本便宜.
还有很多可以填写：
This book is more comprehensive than that one.
这本书比那本更全面.
This book is older than that one.
这本书比那本老.
This book is more popular than that one.
这本书比那本畅销.
等等等等,各种形容词.
楼主还要的话,追问我就是了.
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