I found it difficult to fall asleep.
我发现很难入睡。
Why is it so difficult to fall asleep when you are overtired?
为何你劳累过度却又如此难以入睡？
All these activities can increase alertness and make it difficult to fall asleep.
所有这些活动会提高你的灵敏度，让睡觉变得很困难。
It is very difficult for me to fall asleep these days.
最近好像很难入睡的样子。
It is very difficult for me to fall asleep these days.
最近好像很难入睡的样子。
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