1
use a local anesthetic
The dentist used a local anesthetic before filling the cavity.
牙医在补牙前使用了局部麻醉药。
局部麻醉剂；局部麻醉药
先理解核心含义，再看它在真实句子里的用法。
局部麻醉剂；局部麻醉药
An anesthetic that causes loss of sensation only in the area where it is applied.
The dentist used a local anesthetic before filling the cavity.
牙医在补牙前使用了局部麻醉药。
一种仅使施用部位失去感觉的麻醉剂。
An anesthetic (anesthetic substance) that causes loss of sensation only to the area to which it is applied.
The dentist applied a local anesthetic before filling the cavity.
牙医在补牙前使用了局部麻醉药。
For a minor skin biopsy, a local anesthetic is usually sufficient.
对于小面积的皮肤活检，局部麻醉剂通常就足够了。
Many tattoo artists use a topical local anesthetic to numb the skin beforehand.
许多纹身师会事先使用外用局部麻醉药来麻痹皮肤。
The dentist used a local anesthetic before filling the cavity.
牙医在补牙前使用了局部麻醉药。
The doctor administered a local anesthetic to numb the area.
医生施用了局部麻醉剂以麻痹该区域。
Do I need a local anesthetic for the procedure?
这个手术我需要局部麻醉吗？
Not this
The dentist used local anesthetic to numb my gum.
Use this
The dentist used a local anesthetic to numb my gum.
local anesthetic 作为可数名词短语表示‘一种局部麻醉药’时，需要不定冠词 a。中文没有冠词，学习者容易遗漏。
Not this
The patient felt local anesthetic in his arm.
Use this
The patient felt local anesthesia in his arm.
local anesthetic 指‘局部麻醉药’，而 local anesthesia 指‘局部麻醉状态’。中文‘局部麻醉’可指两者，学习者易混淆。
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use local anesthetic naturally, then get feedback on meaning, tone, grammar, and phrasing.
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常作可数名词，指一种药物或物质。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.