apply an astringent to sth
apply...to 表示把收敛剂涂抹到某个部位，to 后接受伤或需要处理的部位。
She applied an astringent to the cut to stop the bleeding.
她在伤口上涂了收敛剂来止血。
使组织收缩从而限制血液流动的物质。
A substance that causes body tissues to contract and restricts the flow of blood.
使组织收缩从而限制血液流动的物质。
A substance which draws tissue together, thus restricting the flow of blood.
收敛剂
a drug that causes contraction of body tissues and canals
The dentist applied an astringent to stop the bleeding after the extraction.
牙医在拔牙后使用了收敛剂来止血。
用法提示：此处'astringent'为名词，指一种能使组织收缩、止血的药物。
Many toners contain a mild astringent to tighten the skin.
许多爽肤水含有温和的收敛剂以紧致皮肤。
用法提示：此处'astringent'为名词，指化妆品中使皮肤紧致的成分。
He used an astringent on his razor cut to reduce the swelling.
他在剃须伤口上用了收敛剂来消肿。
用法提示：此处'astringent'为名词，指外用药水，能收缩组织、减轻肿胀。
apply...to 表示把收敛剂涂抹到某个部位，to 后接受伤或需要处理的部位。
She applied an astringent to the cut to stop the bleeding.
她在伤口上涂了收敛剂来止血。
for 后接该收敛剂所针对的症状或用途，常用于说明产品的适用范围。
Witch hazel is a popular astringent for minor skin irritation.
金缕梅是用于轻微皮肤刺激的常用收敛剂。
use...on 强调把收敛剂施用于某处，on 后接被处理的表面或部位。
Doctors once used an astringent on wounds to limit blood loss.
医生过去常在伤口上使用收敛剂以减少失血。
说产品成分时常用 contain，其后接 astringent 指该产品含有收敛剂成分。
This lotion contains a mild astringent that tightens the skin.
这款乳液含有一种能紧致皮肤的温和收敛剂。
grammar · medium
易错句子The nurse applied a astringent to the cut.
正确表达The nurse applied an astringent to the cut.
astringent 以元音音素 /ə/ 开头，不定冠词要用 an，不能用 a。
grammar · medium
易错句子The doctor prescribed two astringent for the wound.
正确表达The doctor prescribed two astringents for the wound.
astringent 是可数名词，前面有数词 two 时，必须用复数形式 astringents。
grammar · medium
易错句子This lotion is an astringent to oily skin.
正确表达This lotion is an astringent for oily skin.
表示‘用于某种皮肤’的用途时，英语用介词 for，不用 to。
两者都与止血有关，但 astringent 描述的是通过收敛组织、收缩血管来减少出血的作用或成分；styptic 专指直接涂在伤口上的止血成品药，日常更常用来称呼这类药，如止血笔。
astringent 的目的是收敛组织、限制血流；antiseptic 的目的是杀灭或抑制细菌、防止感染。两者都常为外用液体，但作用目标不同：一个是止血收敛，一个是消毒防感染，医学语境中不能互换。
astringent 靠收缩组织、压迫血管来减少出血，属于物理性收敛；coagulant 靠促进血液凝固成块来止血，参与凝血过程。说“止血”时二者都可能出现，但机制不同，不能当作同义词替换。
noun (astringent + -cy; -t- dropped)
adverb (astringent + -ly)
adjective (non- + astringent)
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