他表现出从容自信和冷静。

There was an air of easy assurance and calm about him.

《牛津词典》

然而，奥巴马在整场辩论中表现十分出色，始终保持冷静从容。

Mr Obama's performance during all this was remarkable. He remained calm and unflustered.

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然而，奥巴马在整场辩论中表现十分出色，始终保持冷静从容。

Mr Obama's performance during all this was remarkable. He remained calm and unflustered.

youdao