on (or from) the sidelines
- in (or from) a position where one is observing a situation but is unable or unwilling to be directly involved in it
<被丟在一旁> 無人關心 無人在忽 <被丟在一旁> 無人關心 無人在忽
... in thin trading Monday as investors kept on the sidelines over market uncertainty following new changes in certain trading...
... behind more established veterans. Though the time spent on the sidelines was surely frustrating to each, the countless reps on the practice...