英语语法分析

Instead of her normal southward course towards Alexandria and home, she headed west.

她不走平常向南去亚历山大和家乡的路，而是向西走。

《柯林斯英汉双解大词典》

As the Arctic ice pack spread southward, Norse voyages to the west were rerouted into the open Atlantic, then ended altogether.

由于北极的大片浮冰向南移动，挪威人的航行路线由向西航行改成了向开阔的大西洋航行，后来向西的航行整个都终止了。

It was the midcontinental corridor between two massive ice sheets—the Laurentide to the west—that enabled the southward migration.

正是两块巨大的冰原之间的半大陆性质的通道——西面的劳伦斯泰德冰原——使人们向南迁移成为可能。