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spotty + noun
spotty 作定语修饰 skin、face 等时指“有斑点的”；修饰 record、history 等时指“质量不一的”。
She tried to hide her spotty skin with makeup.
她试图用化妆品遮盖自己长斑的皮肤。
质量不一的
先理解核心含义，再看它在真实句子里的用法。
质量不一的
lacking consistency
She tried to hide her spotty skin with makeup.
她试图用化妆品遮盖自己长斑的皮肤。
有斑点的；布满斑点的。
Having spots; spotted.
出现在不连续的位置或地点
Occurring in non-contiguous positions or locations.
质量参差不齐的。
Of inconsistent quality.
不稳定的:时好时坏
Inconsistent: not reliably good, sometimes bad.
The team's performance has been spotty this season, with some great wins and some bad losses.
球队本赛季的表现时好时坏，有大胜也有惨败。
His attendance at work was spotty, so his boss asked him to explain the gaps.
他上班的出勤率忽高忽低，所以老板要求他解释缘由。
The internet signal in the mountains is spotty, so don't expect a smooth video call.
山区的网络信号不稳定，所以别指望视频通话顺畅。
spotty 作定语修饰 skin、face 等时指“有斑点的”；修饰 record、history 等时指“质量不一的”。
She tried to hide her spotty skin with makeup.
她试图用化妆品遮盖自己长斑的皮肤。
主语常为 signal、service、memory 等，表示不稳定、时好时坏。
The internet connection in this area is spotty.
这个地区的网络连接时好时坏。
spottier 是 spotty 的比较级，用于比较两者在质量或一致性上的差异。
His attendance has been spottier than usual this semester.
这学期他的出勤比平时更不稳定。
Not this
His performance has been spottily this month.
Use this
His performance has been spotty this month.
系动词 has been 后面应用形容词 spotty 作表语；spottily 是副词，不能描述主语的特征。此处表示“时好时坏、不稳定”，必须用形容词。
Not this
His attendance has been spotted recently.
Use this
His attendance has been spotty recently.
spotted 是指“有斑点、有污点”，不能表达“不一致、时好时坏”；表示出勤、质量等不稳定时应用形容词 spotty。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
出勤不稳；时好时坏的出席情况
His spotty attendance at work finally got him fired.
他工作时好时坏的出勤最终导致他被解雇。
不稳定的网络连接
I couldn't finish the video call because of my spotty internet connection.
因为我的网络连接不稳定，我无法完成视频通话。
覆盖不全面；时好时坏的信号覆盖
The mobile network has spotty coverage in rural areas.
该移动网络在农村地区的信号覆盖时好时坏。
时好时坏的履历或表现记录
The restaurant has a spotty record for food safety inspections.
这家餐厅在食品安全检查方面的记录时好时坏。
不稳定或时好时坏的表现
The team's spotty performance this season frustrates the coach.
球队本赛季时好时坏的表现让教练很恼火。
Use spotty naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把spotty记成‘有斑点’：皮肤上斑点一块好一块坏，引申为质量参差不齐、时好时坏。
语域：mixed 常见场景：工作表现、网络信号、学业成绩 表示“质量不一的、时好时坏的”时，多用于日常口语或一般书面语，比如评价表现、信号、记录等；在正式或学术文体中通常更常改用 inconsistent 或 uneven。
所列词都在英式英语中与 spotty 押韵（/ɒti/）：snotty, potty, totty, knotty, dotty, grotty。注意 sporty /ˈspɔːti/ 拼写相似，但元音不同，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.