| 1. | Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available. |
| 如果有相配的电压，可以煮少量水的便携式热水装置是有用的。
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| 2. | Since all three elements are in parallel , they must all have the same voltage across them. |
| 由于三个元件都是并联，它们的端电压必然相同。
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| 3. | This voltage must be in phase with the primary voltage. |
| 这一电压必须与原电压相同。
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| 4. | the maximum temperature, voltage , volume |
| 最高温度, 最高电压, 最大体积
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| 5. | high voltage , blood pressure, praise |
| 高电压, 高血压, 高度的赞扬
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