to weigh something again to find out how heavy it is

Compounds are added to the raw rubber and the final mix is reweighed. 化合物被添加到生橡胶中，最终混合物被重新称量。

If the carrier suspects the weight is inaccurate, they will charge a fee to re-weigh and re-class the shipment.

to consider information again carefully, in order to reach a decision

They use probabilities to weigh and reweigh the risks and rewards of every decision.

The court cannot re-weigh the evidence and set aside the verdict simply because it feels some other result would be more reasonable. 法院不能仅仅因为觉得其他结果更合理就重新权衡证据并撤销判决。