His comments only served to confuse the issue further.
他的评论只是把问题弄得更加复杂。
Do not draw it on the chart, however, as this will confuse the issue.
但是不要把它画在图表上,因为这将使要点模糊不清。
To further confuse the issue, there is an enormous variation in the amount of sleep people feel happy with.
使这个问题进一步复杂化的是,人们感觉愉快的睡眠时间相差很大。
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