乐高积木是世界上最受欢迎的玩具，我想我们每个人都玩过这些著名的塑料积木。
Lego is the most popular toy in the world and I think every one of us played with these famous plastic bricks.
当他们到达目的地时，每一节都被起重机直接吊到楼顶，就像玩具乐高积木一样被组装起来。
Once they arrive at the location, each section is lifted by crane directly to the top of the building, which is assembled like toy Lego bricks.
每一块乐高积木都必须有完美的抓力，既要足够牢固可以抓牢另一块积木，又要足够容易，让孩子们可以把它拉开。
Each Lego brick must have that perfect grasp, strong enough to hold onto another brick but easy enough for a child to pull apart.
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