The gunman had singled Debilly out and waited for him.持枪歹徒瞄准了德比利, 然后伺机而动。

We wanted to single out the main threat to civilisation.我们想要找出威胁文明的主要因素。

His immediate superior has singled him out for a special mention.他的直接上司专门点名表扬了他。