您要查找的是不是：
- This is a book for young and old (alike). 这本书老少咸宜。
- This is a book I bought secondhand years ago. 这是我几年前买的一本旧书。
- This is a book on modern English usage. 这是一本关于现代英语惯用法的书。
- I am well aware that this is a tough job. 我深知这是一件棘手的工作。
- This is a book about human reproduction. 这是一本关于人的繁育的书。
- This is a thought-compelling book. 这是本令人深思的书。
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- This is a sort of indeterminate color. 这是一种说不清的颜色。
- This is a book useful for beginners in French. 这是一本对初学法语的人有帮助的书。
- This is a ploy to gain publicity for his new book. 这是为他的新作求名的手段。
- This is a coat of her own making. 这是她亲手做的外衣。
- This is a good place for a picnic. 这是一个野餐的好地方。
- This is a question that they have often debated. 这是个他们常讨论的问题。
- This is a task well within your ability. 这完全是你力所能及的工作。
- This is a very popular name for a girl. 这是一个非常普通的女孩名字。
- I certify that this is a true copy. 我证明这是真副本。
- This is a book designed mainly for use in college. 这是一本主要供大学使用的书。
- This is a kind of lavender-water. 这是一种熏衣草香水。
- This is a kind of metallic paint. 这是一种有金属光泽的涂料。
- This is a large passenger airliner. 这是一架大型客机。
