| 1. | Corresponding figures for lead were 27 and 4. 7 .
铅的相关曲线为27和47。 |
| 2. | Lead has a lower melting-point than iron .
铅的熔点比铁低。 |
| 3. | Are our children being poisoned by lead in the atmosphere ?
我们的儿童是否受着空气中铅的毒害？ |
| 4. | If more bentonite clay is used, the lead temperature must be decreased .
如果多用膨润土，铅的温度必须降低。 |
| 5. | Captain sellers introduced the tap of bell as a signal to heave the lead .
赛勒斯船长提出了以敲铃为抛测铅的办法。 |
| 6. | The former was of gold and sharp pointed, the latter blunt and tipped with lead .
一支是尖头金的，另一支是钝头铅的。 |
| 7. | Another reason for banning lead in gasoline is that the lead can ruin the catalytic converter .
禁止汽油里含铅的另一个原因，是铅能损坏催化式排气净化器。 |
| 8. | Lead smelters may use almost entirely scrap automotive storage batteries as their essential lead supply .
铅冶炼厂可以几乎全部使用报废的汽车电池作为它们的主要的铅的供应来源。 |
| 9. | Correlation between blood lead levels and exposure to lead in ambient air was exhibited by goldsmith and hexter .
Goldsmith和Hexter揭示了血铅水平和暴露于带铅的空气环境的关系。 |
| 10. | One may conclude that these two materials exist as a chemical mixture with distinct particles of lead oxide and lead .
人们可以认为这两种物质是作为一种化学混合物而存在的，它具有明显的氧化铅和铅的颗粒。 |
