1
astatine is a(n) [adj] element
常用于描述其化学性质。
Astatine is a highly unstable radioactive element.
砹是一种高度不稳定的放射性元素。
砹
先理解核心含义，再看它在真实句子里的用法。
砹
A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85.
Astatine is a highly unstable radioactive element.
砹是一种高度不稳定的放射性元素。
一种高放射性化学元素(符号At),卤素之一,原子序数85。
A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85.
Scientists study astatine because of its radioactive properties.
科学家研究砹是因为它的放射性特性。
Astatine is one of the rarest elements on Earth.
砹是地球上最稀有的元素之一。
The halogen astatine is found in trace amounts in uranium ores.
卤素砹在铀矿中以痕量存在。
常用于描述其化学性质。
Astatine is a highly unstable radioactive element.
砹是一种高度不稳定的放射性元素。
用于讨论其发现或特性。
The discovery of astatine occurred in 1940.
砹的发现发生在1940年。
用于描述其行为或反应。
Astatine decays into other elements over time.
砹随时间衰变成其他元素。
Not this
An astatine is a radioactive element.
Use this
Astatine is a radioactive element.
化学元素名称在英语中通常不可数，因此不需要不定冠词'an'，应直接使用'astatine'来表示该元素。
Not this
The astatines in the lab are highly radioactive.
Use this
The astatine in the lab is highly radioactive.
化学元素名称通常不可数，不应加-s变为复数，应保持单数形式，动词也相应使用单数。
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通常不可数，作为化学元素名称
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 ECDICT, WIKTIONARY.