mass noun
1- the carrying of a boat or its cargo between two navigable waters（两条水路间船只或货物的）陆上运输：
the return journey was made much simpler by portage.
回程按陆上运输方式进行, 因而要简单得多。
1.1
- count noun a place at which this is necessary陆上运输点：
a portage over the weir.
拦河坝上方的陆上运输点。
1.2
- archaic the action of carrying or transporting something〈古〉搬运; 运输。
with obj.
1- carry (a boat or its cargo) between navigable waters（在两条水路间）搬运; 运输（船只, 货物）：
we portaged everything here.
我们把这里的一切都搬运走了。
1.1
- no obj., with adverbial(of a boat) be carried between or across unnavigable waters（船）（从不通航水域之间的陆路或从不通航水域上方）被运送：
the cataracts meant that boats had to portage on to the Lualaba.
这些大瀑布意味着船只必须从陆路搬运到卢瓦拉巴河。
词源
late Middle English: from French, from porter 'carry'. The sense relating to carrying between navigable waters dates from the late 17th cent.