The man spoke in a strange voice and I couldn't

pick out
取出, 去掉
The child refuses to eat this fruit without first picking out the stones.
不把果核取出来, 那个小孩就不会吃这水果。
挑选, 选择; 选拔
They have picked out the best items on the menu.
他们从菜单上选出最好的菜。
分辨出
There were so many people at the conference that I couldn't pick him out.
参加会议的人太多了, 我没法认出他。
了解; 领会
I picked out the meaning of the passage.
我领会了这段文章的含义。
衬托, 点缀, 使明显
The design was picked out in the bright red.
这图案在鲜红色衬托下很显眼。
凭听觉〔记忆〕奏出
She tried to pick out the tune of a song she had heard on the radio.
她试图凭听觉记忆摸索着奏出那首她从广播里听到的歌曲。