"We spent the summer trekking in the foothills of the Himalayas"
"They trekked towards the North Pole with sleds and skis"
Every time we wanted water it was a trek.
It would mean trekking down to the kitchen again.
牛津高階第八版
美國韋氏詞典
Dictionary.com
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維基百科 (自由的百科全書)