他在屋顶上的钢横梁上吊上电灯。
钢罐是在四十年代的某个时候开始使用的。
钢是由铁炼成的。
如果必要，我们可用铝代替钢。
刺刀刃是用最优质的钢锻造的。
如果必要，我们可用铝代钢。
如果钢比水重，为什么船能在海上漂浮？
If steel is heavier than water, why are ships able to float on the sea?
解放前全国钢年产量最高才90多万吨。
Before liberation, China's highest annual output of steel was only just over 900,000 tons.
如果钢比水重，为什么船能在海上漂起来。
If steel is heavier than water, why are ships able to float on the sea.
一个钢罐可以装满玉米。
声音通过钢的传导方式和在空气中的传导方式一样。
Sound is conducted through steel in the same manner as through air.
这些巨大的钢集装箱把产品从一个国家运到另一个国家。
These huge steel containers carry products from one country to another.
钢很结实。
数百艘船的钢壳在冰冷的北大西洋中裂开，其中12艘船裂成两半沉没。
The steel shells of hundreds of the ships cracked in the icy north Atlantic, and 12 broke in half and sank.
第二次世界大战期间，钢在低温下的易碎性首次成为人们关注的主要问题。
Steel's fragility at low temperatures first became a major concern during the Second World War.
到了20世纪20年代，随着大众舞蹈运动的出现，人们聚在一起听钢棒吉他乐。
By the 1920s, with the advent of the public dance movement, people were gathering in large groups to listen to steel guitar music.
由此产生的钢似乎达到了强度和韧性的结合，这与合金含量非常高因而非常昂贵的现代钢相当。
The resulting steel appears to achieve a combination of strength and toughness that is comparable to that of modern steels that are very rich in alloy content and, therefore, very expensive.
确保它们干净，将它们放进发酵箱里。用你干净的双手或是不锈钢/塑料的捣土豆器弄碎它们。
Ensure that they are clean and place into a fermentation bin. Crush with your clean hands or a sterilized stainless steel/plastic potato masher.
为了减少建筑的整体重量，它在楼层中使用了较少的混凝土；这反过来又减少了对结构钢的使用。
To reduce the overall weight of the building, it used less concrete in the floors; that in turn enabled it to cut down on structural steel.
这个巨大钢件在不久之后将被置于一个大型燃汽涡轮机的中心，该涡轮机发电量足可以满足一个小城市的需要。
This enormous hunk of steel will soon be at the centre of a gas turbine big enough to meet the electricity needs of a small city.
轮子旋转时需要承受巨大的和不断变化的压力，所以要使结构更坚固，钢的部分要用螺栓连接，而不是焊接在一起。
The wheel would need to withstand immense and constantly changing stresses as it rotated, so to make the structure more robust, the steel sections were bolted rather than welded together.
然而现在，一种新型的钢已经被开发出来，它可以在更低的温度下抵抗断裂，同时保持其强度和韧性，而不需要昂贵的添加剂。
Now, though, a novel type of steel has been developed that resists fractures at much lower temperatures, while retaining its strength and toughness—without the need for expensive additives.
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