the lower part/half of sth
表示“下方的、底部的”时，lower 通常作定语，放在名词前面。
The lower half of the wall is painted blue.
墙的下半部分刷成了蓝色。
底部的；下方的
地势较低的；靠海岸的；靠南的；较年长的；底部的；更靠近物体底部而不是中间位置的。；位于较低地势、靠近海岸或更靠南的。；较年长的。
bottom; nearer the bottom than the middle of something
底部的；更靠近物体底部而不是中间位置的。
Bottom; more towards the bottom than the middle of an object.
位于较低地势、靠近海岸或更靠南的。
Situated on lower ground, nearer a coast, or more southerly.
较年长的。
Older.
She put the book on the lower shelf.
她把书放在下层架子上。
用法提示：lower 作形容词，表示‘底部的、下方的’，修饰名词 shelf。
The lower half of the window was covered with frost.
窗户的下半部分结满了霜。
用法提示：lower 作形容词，表示‘下部的’，修饰名词 half。
He has a pain in his lower back.
他下背部疼痛。
用法提示：lower 作形容词，表示‘下部的’，修饰名词 back。
表示“下方的、底部的”时，lower 通常作定语，放在名词前面。
The lower half of the wall is painted blue.
墙的下半部分刷成了蓝色。
常与身体部位搭配，指该部位偏下的那一部分，如 lower back（下背部）。
He bit his lower lip to keep from laughing.
他咬着下嘴唇，忍住不笑。
用于地理语境，指更靠近下游、海岸或南方的位置。
The lower reaches of the river are wide and slow.
这条河的下游河段又宽又缓。
grammar · medium
易错句子This chair is more lower than that one.
正确表达This chair is lower than that one.
lower 本身已经是 low 的比较级，不能再在前面加 more。英语里比较级只标记一次：要么用 -er 形式，要么用 more + 原级，二者不能同时出现；中文说"更低"时容易把"更"也翻译成 more，造成双重比较级。
grammar · medium
易错句子My new apartment is very lower than the old one.
正确表达My new apartment is much lower than the old one.
修饰比较级要用 much、far、a lot 等程度副词，不能用 very。very 只能修饰原级（very low）；要表示"低得多"，比较级前用 much，所以 very lower 应改为 much lower。
grammar · medium
易错句子She is the lower of the three sisters.
正确表达She is the lowest of the three sisters.
比较三者或三者以上时要用最高级 lowest，比较级 lower 只用于两者之间（如 the lower of the two）。句中三个人作比较，标准英语用最高级，所以 the lower of the three 应改为 the lowest of the three。
下唇
She bit her lower lip nervously.
她紧张地咬着下唇。
腰部；下背部
He has a dull pain in his lower back.
他的腰部隐隐作痛。
下颌
The boxer broke his lower jaw in the fight.
那名拳击手在比赛中下颌骨折。
下半部分
The price is printed in the lower half of the page.
价格印在页面的下半部分。
下限
The government set a lower limit on wages.
政府设定了工资下限。
（河流的）下游河段
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.
The city lies on the lower reaches of the river.
这座城市位于这条河的下游河段。