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- Ammonia gas is colorless which can turn wet red litmus paper to blue. 氨气是无色的，它可把湿的红色石蕊试纸变成蓝色。
- Ammonia gas NH 3 is colorless which can turn wet red litmus paper to blue. 氨气是无色的，它可把湿的红色石蕊试纸变成蓝色。
- NH 4 + when heated with sodium hydroxide solution, a colorless gas (ammonia) is given out which can turn wet red litmus paper to blue. 铵盐和氢氧化钠溶液共热时会放出一种无色气体(氨)，它可把湿的红色石蕊试纸变蓝。
- The following information shows the result of an experiment when pieces of blue litmus paper and red litmus paper are dipped into three liquids, X , Y and Z. 下列的资料显示蓝色和红色石蕊试纸浸入X、Y和Z三种液体时的试验结果。
- 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
- red litmus paper [医] 红石蕊试纸
- Litmus paper can be used as an indicator of the presence of acid in a solution. 石蕊试纸可用以测试溶液是否含酸。
- VOICE: There's no litmus paper that can detect God. 根本沒有石蕊紙可以發現上帝的存在。
- We test the liquid for acidity with a strip of litmus paper. 我们用一条石蕊试纸来试验这液体是不是酸性的。
- A laboratory cunt and no litmus paper that could take her color. 他家族中的女人们在九世纪曾两次改换祖先，到了文艺复兴期间又换了一次。
- Or, if you are unwilling to look at it closely, examine it with a piece of pH test paper (litmus paper). 在学术界及营养学上，一般将食品分成酸性食品和碱性食品两大类。
- "In the form of a water solution or as litmus paper, it is the oldest and most-used indicator of whether a substance is an acid or a Base. 它的水溶液,或者做成石蕊纸后,是最古老和最常用的指示剂,可以指示一种物质是酸还是碱。
- Strong bases that turn litmus paper blue, they react with acids to yield salts, are caustic, and in concentrated form corrode tissues. 它们与酸作用成为中性盐；它们是苛性的，其浓缩物可腐蚀有机组织。
- Sourness is just another word for acidity, Suslick said, which any high school chemistry student can test for using litmus paper. 萨司利克说，酸味只是酸度的另一种表述方式，任何一间中学的化学学生都可以用石蕊试纸进行它的测量。
- 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。
- A bright red welt rose on his arm. 他的手臂上起了明显的条状红肿。
- A red light is usually a signal of danger. 红灯通常是危险的信号。
- He wore a red carnation in his buttonhole. 他的扣洞上了一朵红色康乃馨。
- He pulled a red sweater on over his shirt. 他在衬衣外面套上了一件红色毛衣。
