s course was finally explored
...Nile from Lake Victoria through to Lake Albert，that this part of the river’s course was finally explored. （强调句型） 6.It was believed that the northern coast of this continent lay somewhere in the Pacific Ocean.
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s course was finally explored
最后对S课程进行了探索
以上为机器翻译结果，长、整句建议使用 人工翻译 。