电动汽车曾是新奇事物，但现在已随处可见。

Electric cars were once a ___novelty, but now they're everywhere.

对许多居民来说，新的轻轨系统是个令人兴奋的新鲜事物。

For many residents, the new light rail system is an exciting ___novelty.

对某些员工来说，居家办公的新鲜感很快就消失了。

The ___novelty of working from home quickly wore off for some employees.