v. 艰苦跋涉（trek的现在分词）
n. 艰苦跋涉，徒步旅行；艰难旅程

Trek \Trek\, v. i. [imp. & p. p. {Trekked}; p. pr. & vb. n.
{Trekking}.] [Written also {treck}.] [D. trekken. See
{Track}, n.] [South Africa]
1. To draw or haul a load, as oxen.
[Webster 1913 Suppl.]

2. To travel, esp. by ox wagon; to go from place to place; to
migrate. [Chiefly South Africa]

One of the motives which induced the Boers of 1836
to trek out of the Colony. --James Bryce.
[Webster 1913 Suppl.]