a couple of

a couple of    一对，一些，几个

【例句】

◆ I found a couple of socks in the bedroom but they didn't make a pair. 我在卧室里找到两只袜子，但不成对。

◆There have been a couple of  studies suggesting they are increasing their song output at night and during the day they are still singing. 一些研究显示它们晚上增加它们的歌曲产量，在白天它们仍在唱歌。（四川高考）