in the groove
短语处于最佳状态, 流行中
教材释义与例句
合时；得心应手；(歌曲等)流行的；完美的
劲舞团；处于最佳状态；流行中
释义与例句
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1.
Running or performing extremely smoothly.
非正式 -
2.
Playing perfectly, perfectly in sync with others, or with perfect focus.
俚语 音乐The jazz musicians gave no grandstand performances; they simply got a great burn from playing in the groove.
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3.
Used other than figuratively or idiomatically: see in, groove.
The whole course of legislation... had flowed in the same groove for centuries.
[…] having such a wonderful time which puts me in a groove […]
词源
Originally slang that first appeared in the mid-19th century with a (usually pejorative) reference to the difficulty of leaving a well-worn rut (see in a rut). As back in the groove, the phrase acquired a positive sense of returning to one's usual self after a period of illness, setbacks, etc. With special regard for music, originally US jazz slang from the 1920s, possibly with reference to the grooves of early records.
来源：wiktionary