您要查找的是不是：
- It is the new material called carbonic acid(H2CO3,a kind of acid) that turns purple litmus red . 就是因为生成新物质碳酸(H2CO3一种酸)，碳酸使紫色石蕊试液变红。
- The purple litmus solution turned red.It is the new material called carbonic acid(H2CO3,a kind of acid) that turns purple litmus red . 就是因为生成新物质碳酸(H2CO3一种酸)，碳酸使紫色石蕊试液变红。
- Litmus paper turns red in the presence of an acid. 石蕊试纸遇到酸就变红。
- Litmus paper turns red on contact with an acid. 石蕊试纸遇酸度会变红
- A bright red welt rose on his arm. 他的手臂上起了明显的条状红肿。
- any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt. 各种水溶性的化合物，有酸味，能将石蕊变红，和碱反应可形成盐。
- A red light is usually a signal of danger. 红灯通常是危险的信号。
- any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt 各种水溶性的化合物，有酸味，能将石蕊变红，和碱反应可形成盐
- He wore a red carnation in his buttonhole. 他的扣洞上了一朵红色康乃馨。
- The boy is daubing a piece of paper with red ink. 那孩子正在用红墨水在纸上乱涂。
- He pulled a red sweater on over his shirt. 他在衬衣外面套上了一件红色毛衣。
- Keep on go till you come to a red brick building. 一直往前走直到一座红砖楼为止。
- The land is laid down with red or white clover. 这块土地种上了红花和白花苜蓿。
- Everyone at the rally wore red ribbons as favours. 参加集会的人都系著红丝带作为支持大会的标记。
- Her criticisms were enough to make anyone see red. 她那些批评任谁都得火冒三丈。
- I have a red tracksuit with fleecy lining. 我有一件红色的有羊毛衬里的运动服。
- How much money are you riding on the red horse? 你在那匹红马身上押了多少钱？
- Examples are litmus and phenolphthalein. 例如石蕊和酚酞。
- How much red ink is there in the ink-pot? 墨水瓶里有多少红墨水？
- Neutral reaction by litmus indicating paper. 石蕊试纸呈中性反应。
