他们沿着河岸向西出发了。They set out in a westerly direction along the riverbank.甚至近海1英里处就有向西涌动的汹涌潮水。There is a strong west-going tide, even one mile offshore.他从帕洛斯-德拉弗龙特拉向西航行。He sailed westward from Palos de la Frontera....

“向西”的英语可以翻译为：westering，westwardly ...