sideline
noun [ C ] uk/ˈsaɪd.laɪn/ us/ˈsaɪd.laɪn/
(JOB)
副业，兼职工作
an activity that you do as well as your main job
Jim works in a bank, but teaches French in the evenings as a sideline. 吉姆在银行工作，但他在晚上兼职教法语。
(SPORT)
mainly US (UK usually touchline)（运动场地上的）边线
a line that shows the position of the side of an area where a sport is played
The ball fell just inside/on/outside the sideline. 球正好落在了边线内／上／外。
Idiom
on/from the sidelinesidiom 旁观；不参与
If you are on the sidelines or do something from the sidelines, you are not actively involved in something.
Women have been on the political sidelines for too long - we must now work towards getting into power. 女性在政治上旁观已久——我们必须努力争取权力。
She could only watch from the sidelines as her brother's health deteriorated. 她只能眼睁睁地看着弟弟的身体垮下去。
sideline
verb [ T ] uk/ˈsaɪd.laɪn/ us/ˈsaɪd.laɪn/
使退出比赛，使停止参赛
If a sports player is sidelined they are prevented from playing or competing, and can only watch.
Johnson has been sidelined through injury. 约翰逊因伤退出了比赛。
使靠边；使不再发挥重要作用；排挤
to stop someone taking an active and important part in something
He was sidelined after criticizing the policy. 他对政策进行了批评以后便遭到了排挤。