7. These shrubs must have an acid, lime-free soil.
这些灌木必须要有酸性、无石灰的土壤。
《柯林斯英汉双解大词典》
8. Litmus paper turns red in the presence of an acid.
石蕊试纸遇到酸就变红。
《牛津词典》
9. Sulphur dioxide is a pollutant and a major contributor to acid rain.
二氧化硫是一种污染物，并且是形成酸雨的主要因素。
《牛津词典》
10. Iron and folic acid supplements are frequently given to pregnant women.
铁和叶酸补充剂常给孕妇服用。
《柯林斯英汉双解大词典》
11. Citric acid can be extracted from the juice of oranges, lemons, limes or grapefruit.
柠檬酸可以从橙汁、柠檬汁、酸橙汁或柚子汁中提取。
《柯林斯英汉双解大词典》
12. Antacids are alkaline and they relieve pain by neutralizing acid in the contents of the stomach.
抗酸剂是碱性的，它们通过中和胃容物中的酸来缓解疼痛。
《柯林斯英汉双解大词典》
13. How can we prevent acid rain?
我们怎么防治酸雨呢？
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14. What else does sulfuric acid do?
硫酸还能做什么？
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15. A lemon is an acid fruit.
柠檬是一种酸味水果。
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16. The acid has burnt a hole in my jacket.
这种酸把我的上衣烧了一个窟窿。
《新英汉大辞典》
17. Does that metal pit after contact with acid?
那种金属同酸接触后是否会起凹点？
《新英汉大辞典》
18. Those needles add a lot of acid to the soil.
这些松针给土壤增加了很多酸性。
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19. Large quantities of nitric acid were produced.
大量的硝酸产生了。
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20. Sulfuric acid eats away at limestone very aggressively.
硫酸对石灰石的侵蚀非常厉害。
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21. We've said that sulfuric acid dissolves limestone, right?
我们说过，硫酸可以溶解石灰石，对吗？
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22. This is significant, because the amino acid sequence of an enzyme is determined by genes.
这很重要，因为酶的氨基酸序列是由基因决定的。
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23. The organic litter of another tree species might add less acid but more of something else.
另一种树种的有机凋落物可能不会添加这么多酸，但会添加较多的其他物质。
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24. The fun is all about expression people make as all that citric acid hits their taste buds.
有趣的是，当所有的柠檬酸冲击他们的味蕾时，人们做出的各种表情。
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25. When hydrogen sulfide reacts with the oxygen in the water, the result of that is sulfuric acid.
当硫化氢与水中的氧反应，得到的就是硫酸。
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26. When cave researchers go to explore them, they see and smell, the sulfuric acid and gases at work.
当洞穴研究人员进一步探索时，他们会在这个过程中发现硫酸，并闻到它的味道。
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27. The proportion of free oleic acid that an olive oil contains is an accurate measure of the oil's acidity.
橄榄油中游离油酸的比例是对橄榄油酸度的精确测量。
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28. Analysis by gel electrophoresis revealed slight differences in amino acid sequence of the enzymes of two of the four pairs.
经凝胶电泳分析，发现四对实验对象中有两对的酶的氨基酸序列略有差异。
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29. Words like "acid", "gravity", "electricity" and "pendulum" had to be invented just to stop their meetings turning into an endless game of charades.
30. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert.
