How could this rock, which weighed several tons, have been lifted to this spot, without the aid of many men?
这块大石头重达数吨，假如没有许多人一起用力，怎么能把它抬到这个地方上去呢？
This gift was the amber Room, which was given this name because several tons of amber were used to make it.
这件礼物就是琥珀屋，它之所以有这个名字，是因为造这件房子用了好几吨的琥珀。
This gift was the amber Room, which was given this name because several tons of amber were used to make it.
这件礼物就是琥珀屋，它之所以有这个名字，是因为造这间房子用了很多吨琥珀。
And how many people does it take to drag a block weighing several tons 480 feet up into the sky?
把几吨重的石块提举到480英尺的高处又需要多少人力呢？
This gift was the Amber Room, was given this name because several tons of amber were used to make it.
这件礼物就是琥珀屋，它之所以有这个名字，是因为造这间房子用了好几吨的琥珀。
Though limited by the requirements of portability and ease of manual operation, jacks may LIFT, or exert a force of, several tons.
为了符合易于携带和用手操作的条件，其功率不免受到限制，然而，千斤顶仍足以举起好几吨的重量或施加好几吨的力量。
For example, when you're putting the block right at the top, how are you going to lug a block of stone that weighs several tons 480 feet up a structure?
比如，当你要把一个石块放在顶端时，你该如何把一个几吨重的石块提升到480英尺的高度呢？
Forging is an important hot-forming process. It is used in producing components of all shapes and sizes, from quite small items to large units weighing several tons.
锻造是一种重要的热成型工艺。它能用于生产各种形状和尺寸、从很小到重量数吨的零件。
Forging is an important hot-forming process. It is used in producing components of all shapes and sizes, from quite small items to large units weighing several tons.
锻造是一种重要的热成型工艺。它能用于生产各种形状和尺寸、从很小到重量数吨的零件。
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