1
a linesman in [sport]
在足球等运动中，linesman 常指巡边员或助理裁判。
The linesman in the tennis match made a close call.
网球比赛中的司线员做出了一次争议判罚。
边线裁判员；巡边员；司线员
先理解核心含义，再看它在真实句子里的用法。
边线裁判员；巡边员；司线员
an official in sports such as tennis, soccer, or football who assists the referee, especially by watching for out-of-bounds or offside
The linesman in the tennis match made a close call.
网球比赛中的司线员做出了一次争议判罚。
助理裁判员
An assistant referee.
主要负责观察蓝线并判断越位情况的官员
An official whose primary task is to watch the blue line and determine when there has been an offside.
主要任务是判定是否发生争球线违例的裁判员。
An official whose primary task is to determine whether there has been a line of scrimmage violation.
受雇从事电线线路工作的人；线路工。
A person employed to work on electrical lines; a lineman.
The linesman raised his flag to signal that the ball had gone out of play.
边线裁判员举起旗子示意球已出界。
In tennis, the linesman called the serve out, and the player challenged the decision.
在网球比赛中，司线员判定发球出界，球员对这一判罚提出质疑。
The crowd disagreed with the linesman, but the referee trusted his assistant's call.
观众不认同边线裁判员的判罚，但主裁判信任其助手的判断。
在足球等运动中，linesman 常指巡边员或助理裁判。
The linesman in the tennis match made a close call.
网球比赛中的司线员做出了一次争议判罚。
linesman 的复数形式是 linesmen，注意发音为 /ˈlainzmən/。
The linesmen signaled that the ball had crossed the line.
巡边员示意球已越过边线。
也可用 serve as a linesman，但 act as 更强调临时代理。
She acted as a linesman at the local football match.
她在那场本地足球比赛中担任巡边员。
Not this
The linesmans were checking whether the ball was in or out.
Use this
The linesmen were checking whether the ball was in or out.
linesman 的复数是不规则形式 linesmen，不能直接加 -s 变成 linesmans。以 -man 结尾的复合名词变复数时要把 man 改为 men。
Not this
The referee at the sideline signaled an offside.
Use this
The linesman at the sideline signaled an offside.
referee 指主裁判，linesman 指负责观察边线或越位的边线裁判员/巡边员。在边线举旗示意越位的是 linesman，不是 referee，这是英语中两个不同职责的词。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
巡边员的旗子
The linesman's flag went up for offside.
巡边员因越位举旗示意。
边线裁判员的判罚
The players argued about the linesman's decision.
球员们对边线裁判员的判罚争论不休。
巡边员示意
The linesman signals that the ball is out of play.
巡边员示意球已出界。
询问巡边员
The referee asked the linesman if the player was offside.
裁判询问巡边员那名球员是否越位。
Use linesman naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
line（线）+ man（人）：记住“看线的人”就是边线裁判员，目光紧盯着球场边线。
语域：neutral 常见场景：网球/足球/橄榄球等体育比赛、裁判执法与边线判罚 通常用于正式或中性语体，多出现在体育报道、规则说明或裁判相关语境中。
拼写都以 -sman 结尾，但发音不同：linesman /ˈlaɪnzmən/ 和 salesman /ˈseɪlzmən/ 中的 s 都读 /z/；tradesman /ˈtreɪdzmən/ 也含 /z/ 音。注意形近词：statesman /ˈsteɪtsmən/、sportsman /ˈspɔːrtsmən/ 读 /ts/，horseman /ˈhɔːrsmən/ 读 /s/，不要按拼写读成 /z/。
Dictionary facts from ECDICT, WIKTIONARY.