While some boats could pass between the islands, the two straits were the most frequented navigation routes.
虽然一些船只可以在岛屿之间通行，但这两个海峡是最常见的航行路线。
Navigation route
原声例句
迷人历史
英语百科
Course (navigation)
（重定向自Navigation route）
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In navigation, an object's course is the direction over the ground along which the object is currently moving.
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