singly
01
单独地, 一个一个地
without involving others at the same time
例子
Birds flew in singly from the treetops to the feeder.
鸟儿们从树梢一只接一只地飞向喂食器。
02
独自, 独立地
without help or participation from others
例子
She built the entire website singly, without a developer.
她独自建立了整个网站，没有开发人员。
