Definition: when you go on a long, difficult journey on foot Level: B2
我们想去喜马拉雅山脉徒步旅行。
We want to go ___trekking in the Himalayas.
我听说她要去非洲进行一些徒步旅行。
I hear she's going to Africa for some ___trekking.
徒步穿越丛林可能很累人但很有收获。
___Trekking through the jungle can be exhausting but rewarding.
