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sequins on [clothing]
表示衣物上有亮片时，sequin 常用复数，介词用 on。
There were sequins on her dress.
她的连衣裙上有亮片。
亮片
sequins — plural of sequin
先理解核心含义，再看它在真实句子里的用法。
亮片
a small shiny disk used to decorate clothing
There were sequins on her dress.
她的连衣裙上有亮片。
用于装饰华丽服装的闪光亮片。
A sparkling spangle used for the decoration of ornate clothing.
She sewed a silver sequin onto her dress for the party.
她为聚会把一枚银色亮片缝在裙子上。
The costume sparkled because it was covered in tiny blue sequins.
那套演出服闪闪发亮，因为上面缀满了蓝色小亮片。
The sequins on her jacket caught the light as she walked past.
她走过时，夹克上的亮片在灯光下闪闪发光。
表示衣物上有亮片时，sequin 常用复数，介词用 on。
There were sequins on her dress.
她的连衣裙上有亮片。
描述衣物上装饰了许多亮片时，可用 be covered with sequins。
The jacket was covered with sequins.
这件夹克上镶满了亮片。
sew...onto 表示把亮片逐一缝到衣物表面，强调动作的对象和结果。
She sewed sequins onto the costume.
她把亮片缝在戏服上。
Not this
The costume was covered with colorful sequin.
Use this
The costume was covered with colorful sequins.
sequin 是可数名词，表示多颗亮片时要用复数形式 sequins；汉语没有复数标记，所以容易漏掉 -s。
Not this
The dress is sequin.
Use this
The dress is sequined.
sequin 是名词，不能直接放在 be 动词后作表语形容词；要表示“镶有亮片的”，要用其过去分词形式 sequined（或 sequinned）作形容词。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
亮片连衣裙
She wore a sequin dress to the party.
她穿了一条亮片连衣裙去参加派对。
亮片上衣
The sequin top was too flashy for the office.
这件亮片上衣穿去办公室太花哨了。
金色亮片
The costume was covered in gold sequins.
这套演出服上缀满了金色亮片。
缝上一片亮片
I need to sew on a sequin that fell off.
我需要把掉下来的亮片缝回去。
因亮片而闪闪发光
Her jacket sparkled with sequins under the lights.
在灯光下，她的夹克衫上的亮片闪闪发光。
亮片布料
The designer chose sequin fabric for the gown.
设计师为这件礼服选了亮片布料。
Use sequins naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
音近 "see queen"（看见女王），想象女王礼服上闪闪发亮的小圆片，即亮片。
语域：neutral 常见场景：服装设计与缝纫、时尚穿搭描述、装饰材料购物 sequin 是普通可数名词，通常指缝在衣服上的闪光小圆片，语气中性，不限于正式或非正式场合，比较常见于时尚、服装制作和手工装饰描述中。
与 /ˈsiːkwɪn/ 完全押韵的常用词很少；本组词主要比较拼写或局部音。sequence 与 sequin 共享 'sequ' 的 /siːkw/；penguin 的尾音 /ɡwɪn/ 与 /kwɪn/ 只差首辅音；mannequin 的 'quin' 读 /kɪn/，不是 /kwɪn/，注意勿混淆。queen、quiz、quite 都含 /kw/，但后面元音不同（/iː/、/ɪ/、/aɪ/），不押韵。
Dictionary facts from ECDICT, WIKTIONARY.