Word · Frequency #33
as
阿斯；古罗马磅
A libra; an ancient Roman pound used as a unit of weight.
古罗马重量单位
- 1.
A libra, a Roman pound.
- 2.
a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
一种非常有毒的金属元素,有三种同素异形体；砷及其化合物用于除草剂和杀虫剂及各种合金；存在于毒砂、雌黄和雄黄中
- 3.
a United States territory on the eastern part of the island of Samoa
美国在萨摩亚岛东部的领土
砷；美属萨摩亚；一种非常有毒的金属元素,有三种同素异形体；砷及其化合物用于除草剂和杀虫剂及各种合金；存在于毒砂、雌黄和雄黄中；美国在萨摩亚岛东部的领土
In use
The chemical symbol for arsenic is As.
The sample contained As, so the lab handled it carefully.
AS is the postal abbreviation for American Samoa.
as is a chemical element
作为名词，'as' 指化学元素砷。
as is a chemical element with the symbol As and atomic number 33.
砷是一种化学元素，符号为As，原子序数为33。
as is a territory
作为名词，'as' 指美属萨摩亚。
as is a territory of the United States in the Pacific Ocean.
美属萨摩亚是美国在太平洋的一个领地。
Connections
Collocations
- as poisoning
- 砷中毒
- Chronic as poisoning can cause skin lesions and cancer.慢性砷中毒可导致皮肤病变和癌症。
- as contamination
- 砷污染
- The groundwater as contamination affected thousands of residents.地下水砷污染影响了数千居民。
- as concentration
- 砷浓度
- The as concentration in the soil exceeded safety limits.土壤中的砷浓度超过了安全限值。
- as exposure
- 砷暴露
- Long-term as exposure increases the risk of lung cancer.长期砷暴露增加肺癌风险。
- as removal
- 砷去除
- Effective as removal methods are essential for safe drinking water.有效的砷去除方法对安全饮用水至关重要。
Synonyms
Learner notes
Memory Tip
As既是砷的化学符号，也是美属萨摩亚的缩写，记住这两个含义。
Context & Register
常见场景：地理/政治、化学/毒理学 名词含义有两个：指美属萨摩亚时多用于地理或政治语境；指砷时多用于化学或毒理学语境。
Pronunciation & Spelling
All listed words end with the sound /æs/, matching the target word 'as'. Note that words like 'was' (/wʌz/) or 'has' (/hæz/) have different pronunciations despite similar spelling.
High-value vocabulary
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
Usage priority
Collins 词频等级为 5，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
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.