| 1. | Pyroxenes and amphiboles also contain calcium .
辉石与闪石也含有钙。 |
| 2. | Hemihydrate can be used instead of gypsum .
半水物硫酸钙可以用来代替石膏。 |
| 3. | Strongly acid peat soils are often low in calcium .
强酸性泥炭土常呈现低钙。 |
| 4. | They are alumino-silicates of sodium, potassium and calcium .
它们都是钾和钙的铝硅酸盐类。 |
| 5. | Additions of organic matter to soil hasten calcium losses .
土壤增施有机质会促进钙的损失。 |
| 6. | They may be exacerbated by a simultaneous deficiency of calcium .
由于同时缺乏钙而使之恶化。 |
| 7. | At high calcium concentration they fuse without lysis .
在钙离子浓度高时，他们融合而不解体。 |
| 8. | Thus there is a greater calcium need to immobilize the oxalate .
因而需要较大量钙去固定草酸。 |
| 9. | the reaction reverses at about 1900°f.
亚硫酸钙反应在大约1900F时逆向。 |
| 10. | Calcium cyanamide is poisonous and irritating to the skin .
氰氨化钙是毒性物质，对皮肤有刺激性。 |
