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pitchstone

/ˈpɪtʃstoʊn/

Meanings
noun

沥青玻璃，黑曜岩。

A natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma

Examples :

"The sharp edges of the pitchstone found near the volcano were used by early humans to make tools. "
早期人类利用火山附近发现的沥青玻璃（黑曜岩）锋利的边缘制作工具。
geology material

Related Words

Illustration humans

humans noun

/ˈhjuːmənz/ /ˈjuːmənz/

人类， 人们， 人。

"Humans share common ancestors with other apes."

人类与其他猿类拥有共同的祖先。

Illustration crystallites

crystallites noun

/ˈkrɪstəˌlaɪts/ /ˈkrɪstəˌlɪts/

微晶，晶粒。

"The ceramic tile was made of many tiny crystallites, tightly packed together, giving it strength and resistance to cracking. "

这种瓷砖由许多微小的晶粒紧密结合而成，这赋予了它强度和抗裂性。

Illustration edges

edges noun

/ˈɛdʒɪz/

边缘，边沿。

"The spilled milk ran to the edges of the table. "

洒出来的牛奶流到了桌子的边沿。

Illustration glass

glass verb

/ɡlɑːs/ /ɡlæs/

给...装上玻璃纤维，用玻璃纤维覆盖.

"to fibreglass the hull of a fishing-boat"

用玻璃纤维覆盖渔船的船体.

Illustration natural

natural noun

/ˈnætʃəɹəl/ /-ɚəl/

本地人，居民。

"The new student was a natural from Japan. "

这个新学生是土生土长的日本人。

Illustration sharp

sharp noun

/ʃɑːp/ /ʃɑɹp/

升号

"The pitch pipe sounded out a perfect F♯ (F sharp)."

那个音高调节器发出了完美的升F音。

Illustration volcano

volcano noun

/vɒlˈkeɪnəʊ/ /vɑlˈkeɪnoʊ/

火山

"The school trip to the volcano national park was exciting. "

去火山国家公园的学校旅行真令人兴奋。

Illustration cooling

cooling verb

/ˈkuːlɪŋ/

降温，变冷。

"The soup is cooling on the counter. "

汤正在柜台上降温变冷。

Illustration magma

magma noun

/ˈmæɡ.mə/

岩浆

"The volcano erupted, sending hot magma flowing down the mountainside. "

火山爆发了，滚烫的岩浆顺着山坡流淌下来。

Illustration microscopic

microscopic adjective

/ˌmaɪkɹəˈskɑpɪk/

显微的，微观的

"We supply all microscopic stains and other materials."

我们供应所有显微镜用的染色剂和其他材料。

Illustration formed

formed verb

/fɔːmd/ /fɔɹmd/

形成，构成。

"The children formed a circle to play duck, duck, goose. "

孩子们为了玩“丢手绢”游戏， 形成了一个圆圈。

Illustration rapid

rapid noun

/ˈɹæpɪd/

急流，险滩

"The hikers had to carefully navigate the rapids of the creek to reach the campsite. "

远足者们不得不小心翼翼地通过小溪的急流险滩才能到达营地。