午休期间，工厂的机器闲置着。

During the lunch break, the factory machinery sat ___idle.

许多游客被发现在大厅里无所事事地坐着，而不是去观光。

Many visitors were found sitting ___idle in the lobby instead of touring.

新规定使得几个建筑工程无限期地闲置。

The new regulations left several construction projects ___idle indefinitely.