将下列英文段落中的文法错误全部修正。
The speaker, along with several panelists were, discussing various topics related to the economy. One of the panelists, which was an expert in the field, explain the potential benefits of stimulus packages.
The speaker, along with several panelists, was discussing various topics related to the economy. One of the panelists, who was an expert in the field, explained the potential benefits of stimulus packages.