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| 21. | A degree of collective immunity may be observed. |
| 可见到一定程度的群体免疫力。 |
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| 22. | The hepatitis B vaccine confers lifelong immunity against the chronic illness. |
| 乙型肝炎疫苗能为身体提供永久免疫力。 |
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| 23. | long-term exposure |
| 长期暴露; 长期接触 |
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| 24. | Improve sleeping appetite and immune ability. |
| 可以改善睡眠，增进食欲，提升免疫力。 |
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| 25. | Bifidobacterium Longum to enhance our immunity. |
| 双叉乳杆菌能够提高人体免疫力。 |
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| 26. | She thinks women may be immune to lung cancer. |
| 她认为女性可能对肺癌有免疫力。 |
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| 27. | She thinks women may be immuned to lung cancer. |
| 她认为女性可能对肺癌有免疫力。 |
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| 28. | Secular factors are more long term in nature. |
| 长期因素却是长期的。 |
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| 29. | Most adults are immune to this disease. |
| 大部分成年人对这疾病有免疫力。 |
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| 30. | What are the connection of pumpkin seed, plantago seed,safflower flower, Japanese honeysuckle and Interferon? |
| 南瓜子、车前草、金银花、红花与免疫力之关连? |
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