see , absorb , read , seize , assure oneself
I can't make head or tail of these instructions.
我对这说明书摸不着头脑。
youdao
He spoke such a jargon I couldn't make head or tail of what he said.
他讲那么一种方言土语，我根本不懂他说什么。
She'd taken some notes, which she subsequently could not make head or tail of.
她记了一些笔记，但后来连自己也看不懂。
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