I have no idea what they're going to say, so I'll have to play it by ear.
我一点不知道他们将会说些什么,所以我只好见机行事。
So archaeologists have neither history nor legends to help them to find out where the first 'modern men' came from.
于是,考古学家们既缺乏历史记载,又无口头传说来帮助他们弄清最早的“现代人”是从哪里来的。