It's a trivial matter, by looking at what is the weight and how far does it drop, to say OK, how much work is done by the paddlewheel.

这是一个很简单的问题，通过观察重量是多少以及它下降了多远，来确定桨轮做了多少功。

youdao

So, it's a trivial matter, by looking at what is the weight and how far does it drop, to say OK, how much work is done by the paddle wheel.

好，让我们看看重物的质量,以及它下落的距离，就知道桨轮做了多少功。

youdao

Given that a 747 or 777 is built around an aluminum frame, how difficult would it be and how much weight would be saved by "re-skinning" with the same material that is being used for the 787?

既然是747或777，是围绕着一个铝框，是多么困难，将它多少的重量，将所节省的“再剥皮”，以同样的材料正被用于787吗？

youdao

So, it's a trivial matter, by looking at what is the weight and how far does it drop, to say OK, how much work is done by the paddle wheel.

好，让我们看看重物的质量,以及它下落的距离，就知道桨轮做了多少功。

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