groove
noun [ C ] uk/ɡruːv/ us/ɡruːv/
(NARROW SPACE)
沟;槽;辙;纹
a long, narrow, hollow space cut into a surface
The window slides along a deep metal groove to open and close. 窗户沿着一条深深的金属槽滑动打开或关上。
medical specialized（身体表面的）沟
a long, narrow space in the surface of a body part
There may be nerve compression at the elbow in the ulnar groove. 在手肘处的尺神经沟处可能发生了神经压迫。
Idioms
be/get in the grooveidiom informal 性能出色；表现理想；进行得很成功
to be or start operating or performing successfully
Alex Popov proved he was back in the groove by winning the 100 metres freestyle. 亚历克斯‧波波夫赢得了100米自由泳比赛，这证明他又回到了以前的良好竞技状态。
be (stuck) in a grooveidiom 感到单调乏味;墨守成规
to be bored because you are doing the same things that you have done for a long time
We never do anything exciting any more - we seem to be stuck in a groove. 我们做的事情再也让人感觉不到有意思了——我们似乎太墨守成规了。