rarefy sth
及物用法，表示使某物变稀薄或纯化。
The heat rarefies the gas.
热量使气体变得稀薄。
使稀薄；使变稀；使稀疏
rarefied — past of rarefy
变稀薄；变稀；变得稀薄；使稀薄、稀疏、多孔或密度变小。；变得稀薄、稀疏或密度变小。；使稀少
及物动词
使稀薄、稀疏、多孔或密度变小。
To make rare, thin, porous, or less dense.
变得稀薄、稀疏或密度变小。
To become rare, thin or less dense.
一般现在时
The air rarefies as you climb the mountain.
随着你爬山，空气变得稀薄。
一般过去时
The process rarefied the gas to a near vacuum.
这个过程使气体变得稀薄，接近真空。
现在完成时
Scientists have rarefied the sample for analysis.
科学家们已经将样本纯化以供分析。
规则动词，过去式和过去分词加-ed，现在分词去y加ing，第三人称单数加s。
The air at high altitudes rarefies, making it harder to breathe.
高海拔地区的空气变得稀薄，使人呼吸困难。
用法提示：rarefies 作为动词，表示空气变得稀薄
The philosopher rarefied his thoughts into a concise theory.
这位哲学家将自己的思想精炼成一套简洁的理论。
用法提示：rarefied 作为过去式，表示使思想精炼纯化
Scientists rarefy the gas to study its properties under low pressure.
科学家们使气体稀薄，以研究其在低压下的特性。
用法提示：rarefy 作为动词原形，表示使气体变得稀薄
及物用法，表示使某物变稀薄或纯化。
The heat rarefies the gas.
热量使气体变得稀薄。
不及物用法，主语自身变稀薄。
The atmosphere rarefies at high altitudes.
在高海拔地区，大气变得稀薄。
被动语态，描述状态。
The air in the mountains is rarefied.
山区的空气是稀薄的。
grammar · medium
易错句子The rarefy air at high altitudes is thin.
正确表达The rarefied air at high altitudes is thin.
rarefy 是动词，不能直接用作形容词修饰名词；应使用过去分词 rarefied 作定语，表示“稀薄的”。
grammar · medium
易错句子He has a rarefy talent that few possess.
正确表达He has a rare talent that few possess.
rarefy 意为“使稀薄/纯化”，不表示“罕见的”；应使用形容词 rare 表达“罕见的”意思。
adjective
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