您要查找的是不是：
- This is a historical fact of the past 500 years. 这是近五百年来历史所遗留下来的史实。
- This is a historic high for Hong Kong under any administration. 这是香港有史以来的最高纪录。
- This is a historic peace agreement between both nations. 这项和平协定对两个国家来说都是有历史意义的。
- This is a ( n ) historic occasion, ie will be regarded as a significant event in history. 这是具有重大历史意义的时刻.
- This is a(n)historic occasion,ie will be regarded as a significant event in history. 这是具有重大历史意义的时刻.
- This is hidden old for the Palace Museum, is a historic treasure. 此件为故宫旧藏,是一件富有历史意义的珍品。
- I am well aware that this is a tough job. 我深知这是一件棘手的工作。
- Goethe on his deathbed calls for light and this is a historic remark. 有历史记载曾说过，歌德临终时需要光亮。
- Put on your Sunday best. This is a formal occasion. 穿上你最好的衣服,这是一个正式场合。
- After all, this is a special occasion. 再说，今天又是个特别的日子。
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- This is a great historic change. 伟大的历史性转变。
- This is a sort of indeterminate color. 这是一种说不清的颜色。
- This is a document of historic significance. 这是一个有历史意义的文件。
- 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。
- This is an objective reality and a historical fact. 这是客观的存在，历史的事实。
