| 71. | Acid gnaws into iron . |
| 酸能腐蚀铁。
|
| 72. | The sides of ships are made of iron plates. |
| 船的两舷是用铁板造的。
|
| 73. | Iron works require a large plant. |
| 钢铁厂需要大型机械。
|
| 74. | The iron had become overlaid with rust. |
| 铁上生了一层锈。
|
| 75. | The bucket was weighed up by the mass of iron at the other end of the lever. |
| 吊桶在杠杆另一端铁块的重力下翘了上来。
|
| 76. | iron bands round a barrel |
| 桶外的铁箍
|
| 77. | a long iron bar |
| 长铁条
|
| 78. | an electric cooker, iron , light, etc |
| 电炉, 电熨斗, 电灯等
|
| 79. | mine the earth for iron ore |
| 开采铁矿石
|
| 80. | cast iron |
| 铸铁
|