the clearness of + noun
用于说明某物或某方面的清晰、清澈程度；of 后接具体名词（如水、光）或抽象名词（如思路、表达）。
The clearness of the mountain lake surprised the hikers.
山间湖水的清澈让徒步者大为惊讶。
清晰；明晰；清楚
清澈；明亮；清晰度；畅通；无阻；无干扰；心理或感官上的清晰性；理解、感知等的明晰。；无晦涩或不透明的状态；光线、颜色等的清晰度。；无阻碍或干扰的状态。
clarity of thought, understanding, or perception
指思维、理解或感知上的清晰。
心理或感官上的清晰性；理解、感知等的明晰。
Mental or sensory distinctness; clarity of understanding, perception etc.
无晦涩或不透明的状态；光线、颜色等的清晰度。
The state of being free from obscurities or opacity; distinctness of light, colour etc.
无阻碍或干扰的状态。
The state of being free from obstruction or interference.
The clearness of her explanation helped everyone understand the new rules.
她解释的清晰明了帮助每个人理解了新规则。
用法提示：clearness 是名词，在此表示理解上的清晰性，即解释明白易懂。
I love the clearness of the water in this mountain lake.
我喜欢这座高山湖泊中湖水的清澈。
用法提示：clearness 是名词，在此指水无晦涩或不透明、清澈透明的状态。
The clearness of the road after the snow was cleared made driving much safer.
雪被清理后道路的畅通使驾驶安全多了。
用法提示：clearness 是名词，在此表示道路无阻碍、畅通无阻的状态。
用于说明某物或某方面的清晰、清澈程度；of 后接具体名词（如水、光）或抽象名词（如思路、表达）。
The clearness of the mountain lake surprised the hikers.
山间湖水的清澈让徒步者大为惊讶。
表示清晰性体现在某范围或某方面；in 后常接写作、论证、表达等抽象名词。
The editor praised the clearness in her argument.
编辑称赞了她论证中的清晰性。
用 with which 引导从句，强调做某事时表现出的清晰程度。
The clearness with which she explained the process impressed the class.
她解释这一过程时的清晰程度让全班印象深刻。
grammar · medium
易错句子The clear of the mountain lake surprised us.
正确表达The clearness of the mountain lake surprised us.
clear 是形容词，不能放在 the 之后作主语；这里需要名词表示“清澈”这一状态，故用 clearness。中文“清澈”既可作形容词也可作名词，容易直接套用形容词。
grammar · medium
易错句子He explained the rule with a great clearness.
正确表达He explained the rule with great clearness.
clearness 表示抽象性质，是不可数名词，不能用不定冠词 a 修饰；表示程度直接用 great、much 等即可。这类抽象名词在汉语中常可用“一种……”，因此易误加 a。
头脑清晰；思路清晰
Meditation can bring a remarkable clearness of mind.
冥想能带来非凡的头脑清晰。
思想清晰；思路明晰
Her clearness of thought impressed the committee.
她思路清晰，给委员会留下了深刻印象。
表达清晰
The teacher praised the clearness of expression in his essay.
老师称赞他文章表达清晰。
视力清晰；眼光清晰
The clearness of vision returned after the cataract surgery.
白内障手术后，视力恢复了清晰。
水的清澈
We were amazed by the clearness of the water in the mountain lake.
山间湖水之清澈令我们惊叹。
为了清楚起见
For the sake of clearness, let me restate the main point.
为了清楚起见，让我重述一下要点。
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