They were comparing notes on each other's progress towards solving that most taxing of all puzzles: the riddle of the human genome.
他们就解决人类所面临的最大难题,即人类基因组之谜的进展情况交换了意见。
It's unlikely that you'll be asked to do anything too taxing.
不大可能叫你做什么太费劲的事儿。
See also: tax
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