lower course

基本解釋

The lower course of the han shui flows through a rich lowland.
漢江下游流過一片富庶的低地。
A river, about 1,126 km (700 mi) long, of northwest Afghanistan, northeast Iran, and southern Turkmenistan. Its lower course forms part of the Afghanistan-U. S. S. R. border.
一條位于阿富汗西北部、伊朗東北部和土庫曼南部，流程約1，126公里（700英里）的河，它的下游河道構(gòu)成部分阿富汗-蘇聯(lián)國界。
odict.net
A river of eastern Switzerland, western Austria, and southeast Germany flowing about 515 km (320 mi) to the Danube River. Its lower course forms part of the German-Austrian border.
因河：位于瑞士以東，奧地利以西，德國東南的一條河流，流程515公里（320英里），匯入多瑙河。其下游形成德奧邊界的一部分。
odict.net

And when we say lower in energy, of course, what we mean is more negative.
當然當我們說能量更低時，我們的意思是更為不活躍。
麻省理工公開課 - 化學原理課程節(jié)選

The rigor of these courses may have contributed to the lower course completion rates, not the time spent reading a gradebook.
FORBES: More Interaction In Online Courses Isn't Always Better
Those across the board tax cuts would, of course, lower tax bills for almost everyone.
FORBES: Connect
You can expect higher prices in more expensive areas of the country (and of course, lower prices in less expensive areas of the country).
FORBES: Ask the taxgirl: Comparing Tax Preparer Costs