| 1. | One of the polio vaccines is a killed vaccine
一种脊髓灰质炎疫苗就是死病毒疫苗。 |
| 2. | There are two kinds of polio vaccine
有两种预防小儿麻痹症疫苗。 |
| 3. | How much does polio vaccine cost
问：小儿?痹疫苗的费用是多少？ |
| 4. | There are two kinds of polio vaccine
有两种小儿麻痹症的疫苗。 |
| 5. | There are two kinds of polio vaccine
有两种脊髓灰质炎疫苗。 |
| 6. | There are two kinds of polio vaccine
脊髓灰质炎疫苗有2种。 |
| 7. | There are two kinds of polio vaccine
小儿麻痹疫苗有两种。 |
| 8. | Those cases , however , were caused by the polio vaccine itself
那些是由于骨髓灰质炎疫苗自身所引起的。 |
| 9. | Those cases , however , were caused by the polio vaccine itself
然而，这些案件确是因为小儿麻痹症疫苗本身。 |
| 10. | Those cases , however , were caused by the polio vaccine itself
然而这些病例都是由小儿麻痹症疫苗本身造成的。 |
