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actinides

/ˈæktɪnaɪdz/

Meanings
noun

锕系元素

Any of the 14 radioactive elements of the periodic table that are positioned under the lanthanides, to which they have similar chemistry.

Examples :

"My chemistry textbook explains that the actinides are a series of radioactive elements, including uranium and plutonium, located below the lanthanides on the periodic table. "
我的化学课本解释说，锕系元素是一系列放射性元素，包括铀和钚，它们在元素周期表上位于镧系元素下方。
element chemistry science

Related Words

Illustration including

including verb

/ɪnˈkluːdɪŋ/

包括，包含，涵盖。

"I will purchase the vacation package if you will include car rental."

如果你能把租车费用也包含进去，我就买这个度假套餐。

Illustration textbook

textbook noun

/ˈtɛkst.bʊk/

教科书，教材。

"My math teacher recommended a specific textbook for extra practice. "

我的数学老师推荐了一本指定的教科书供我们课外练习。

Illustration plutonium

plutonium noun

/pluːˈtoʊniəm/

冥王神殿，普鲁托尼俄姆。

"The ancient city's plutonium, a temple to Pluto, was said to be haunted by strange, foul odors. "

这座古城的冥王神殿，普鲁托尼俄姆，据说总是弥漫着奇怪而难闻的气味。

Illustration radioactive

radioactive noun

/ˌɹeɪdioʊˈaktɪv/ /ˌɹeɪdioʊˈæktɪv/

放射性物质，放射物

"The radioactive was carefully stored in a lead-lined container at the science lab. "

科学实验室里，那些放射性物质被小心地储存在一个铅衬容器中。

Illustration lanthanides

lanthanides noun

/ˈlænθənaɪdz/

镧系元素

"Chemists studying the properties of the lanthanides group them together because these elements behave similarly in chemical reactions. "

化学家在研究镧系元素的性质时，通常将它们归为一组，因为这些元素在化学反应中的表现非常相似。

Illustration explains

explains verb

/ɪkˈspleɪnz/ /ɛkˈspleɪnz/

解释，说明。

"To explain a chapter of the Bible."

解释圣经中的一章。

Illustration chemistry

chemistry noun

/ˈkɛm.ɪ.stɹi/

化学，化学科学。

"The chemistry class focused on how different elements combine to form new substances. "

化学课的重点是不同的元素如何结合形成新的物质。

Illustration positioned

positioned verb

/pəˈzɪʃənd/ /pəˈzɪʃənd/

放置，安放。

"The teacher positioned the globe on the table so the students could see it easily. "

老师把地球仪放在桌子上，这样学生们就能很容易地看到了。

Illustration periodic

periodic adjective

/ˌpɪə-/ /ˌpɪɹiˈɑdɪk/ /ˌpɜːɹaɪˈɒdɪk/

周期性的，定期的。

"My doctor recommended periodic checkups for good health. "

为了身体健康，我的医生建议我定期进行体检。

Illustration elements

elements noun

/ˈel.ɪ.mənts/

要素, 成分

"Letters are the elements of written language."

字母是书面语言的基本要素。

Illustration similar

similar noun

/ˈsɪmələ/ /ˈsɪməlɚ/

类似物，相似之处。

"The teacher praised the students' similar answers on the math quiz. "

老师表扬了学生们数学测验中相似的答案。(Lǎoshī biǎoyáng le xuéshengmen shùxué cèyàn zhōng xiāngsì de dá'àn.)

Illustration uranium

uranium noun

/jʊˈɹeɪniəm/

铀, 铀元素

"Nuclear power plants use uranium to generate electricity. "

核电站使用铀来发电。