meaninglessly
adv. 无意义地；无目的地；无道理地
例句
So time does not slip away meaninglessly.
于是时光不会无谓的流逝。
No one would sacrifice anything meaninglessly.
没有意义，没有人愿意牺牲。
The first whisked by with complete disregard, the second flashed meaninglessly.
第一辆车疾驰而过，完全没有注意到他。 第二辆车无意义地闪了闪灯。
