Earlier this year, British explorer Hadow and his team trekked for three months across the frozen Arctic Ocean, taking measurements and recording observations about the ice.
2016年6月六级真题（第一套）听力 Section C
柯林斯高阶英汉双解学习词典释义
VERB
(通常指徒步)艰难旅行，跋涉，远足
If you trek somewhere, you go on a journey across difficult country, usually on foot.