adv.一个一个地；单独地；各自地；分别地
Guests arrived singly or in groups. 客人有单个来的，也有三三两两一起到的。
Do you teach your students singly or in groups? 你教学生是个别地教还是按组教？
She still lives singly now. 她现在仍然过着单身生活。
