His father is an Arctic explorer.

他父亲是一位北极探险者。

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Boy of six: Daddy, when I grow up I want to be an Arctic Explorer.

六岁男孩：爸爸，我长大了要当北极探险家。

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The passage continues: "Mr Salter smiled; to him, it was as though an Arctic explorer had expressed a fear that the weather might turn cold."

小说接着写道：“索尔特先生笑了；他似乎听到了一个北极探险家在诉说他对寒冷天气的畏惧。”

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An arctic explorer needs 6, 000 to 7, 000 calories a day, or 49, 000 a week or so.

FORBES: Scottish Deep Fried Butter and Innumerate Journalists