1
be made of crystal
作为不可数名词时，crystal 指水晶这种材料。
The vase is made of crystal.
这个花瓶是水晶做的。
结晶
crystals — plural of crystal
先理解核心含义，再看它在真实句子里的用法。
结晶
a solid formed by the solidification of a chemical and having a highly regular atomic structure
The vase is made of crystal.
这个花瓶是水晶做的。
由具有长程有序的原子或分子阵列组成的固体,并以三维周期性排列。
A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.
由化学物质固化形成的固体,具有高度规则的原子结构
a solid formed by the solidification of a chemical and having a highly regular atomic structure
一块闪闪发光的矿物,类似于冰或玻璃。
A piece of glimmering, shining mineral resembling ice or glass.
用作各种电子设备组件的晶体元件
a crystalline element used as a component in various electronic devices
The salt formed small white crystals at the bottom of the glass.
盐在玻璃杯底部形成了白色的小结晶。
Under the microscope, we could see the crystal structure of the mineral.
在显微镜下，我们能看到这种矿物的晶体结构。
The chemist heated the substance until it melted and then let it cool into a crystal.
化学家加热这种物质直到它熔化，然后让它冷却成晶体。
作为不可数名词时，crystal 指水晶这种材料。
The vase is made of crystal.
这个花瓶是水晶做的。
作为可数名词时，指单个的水晶晶体或水晶饰品。
She collects crystals.
她收集水晶晶体。
crystal 作形容词时，表示‘水晶的’或‘透明的’，通常放在名词前。
She wore a crystal necklace.
她戴着一条水晶项链。
Not this
This glass is crystal.
Use this
This glass is crystal clear.
英语中，形容词'crystal'通常只用于名词前作定语或固定短语'crystal clear'中，不能单独作表语表示'透明的'；应使用'crystal clear'来修饰。
Not this
The vase is made of a crystal.
Use this
The vase is made of crystal.
当'crystal'指代水晶这种材料时，是不可数名词，不能用不定冠词'a'修饰；应直接用'crystal'表示材料。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
十分透明的；极其清楚的
The water in the lake was crystal clear.
湖里的水十分清澈透明。
水晶球
She looked into the crystal ball to predict the future.
她盯着水晶球预测未来。
晶体结构
The scientist studied the crystal structure of the mineral.
科学家研究了这种矿物的晶体结构。
水晶玻璃
The wine was served in a beautiful crystal glass.
酒盛在漂亮的水晶玻璃杯里。
液晶
Liquid crystal displays are used in many electronic devices.
液晶显示屏用于许多电子设备中。
水晶吊灯
The grand ballroom had a huge crystal chandelier.
宏伟的舞厅里有一盏巨大的水晶吊灯。
非常清楚；清澈透明
Her explanation was crystal clear.
她的解释非常清楚。
水晶球；预测
I wish I had a crystal ball to see what the future holds.
我希望我有一个水晶球来看未来会发生什么。
水晶婚（结婚15周年）
They celebrated their crystal anniversary with a party.
他们举办了一场派对庆祝水晶婚。
Use crystals naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象水晶晶莹剔透，发音"crystal"类似"清澈透"，意为清澈透明的水晶。
名词和形容词均为中性语域。名词常见于科学（如晶体结构）、珠宝（水晶饰品）和装饰品语境；形容词常见于描述物质的透明或清澈（如水晶般的水）。通常不正式也不口语，适用于多数一般性书面和口语场合。
Pedestal, pistol, and distal all rhyme with crystal (ending with /ɪstəl/). Other lookalikes like 'bristle' or 'missile' have different sounds despite similar spelling.
Dictionary facts from ECDICT, WIKTIONARY.