这个问题千头万绪，三言两语说不清楚。
This problem is too complicated to be explained in a few words.
不过今天爸爸却不愿多说什么，况且我们新生活的还有千头万绪要理，结果我也就忘了他的什么惊喜了。
Today, however, Dad would say no more, and, caught ups in the busyness of our new life, I eventually forgot about his surprise.
保护和补助”不成熟产业”直到该产业有足够实力在海外竞争，这样的主张是千头万绪的。
The argument for protecting or subsidising “infant industries” until they have become strong enough to compete abroad is complicated.
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