令人烦恼的事，令人烦恼的人使人烦恼或生气的原因；
She was one of those imperturbable people who never get angry or upset.
但是最令人烦恼的就是没人知道正发生什么事。
But most troubling of all was the simple fact that nobody knew what was going on.
但是最令人烦恼的就是没人知道正发生什么事。
But most troubling of all was the simple fact that nobody knew what was going on.
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