甚至可以估计出,它的重量,所以我相当于秤。

In fact, I might even be able to estimate the weight playing the role of a bathroom scale.

youdao

你能把它放到秤上吗？我好称一称重量。

Could you put it on the scales, so I can check the weight?

youdao

称量硬币时将硬币放在秤的一端，另一端则放已知重量的砝码，直至两端平衡。

To weigh the coin, it would be put on one side of scale, and counterweights of a known weight would be put on the other side until the scales balanced.

youdao