These doubts had been gnawing at him for some time.
这些疑虑已经折磨他一段时间了。
；折磨人苦痛
（gnawing形式）These doubts had been gnawing at him for some time.
这些疑虑已经折磨他一段时间了。
The farmer’s dog has been gnawing away on a bone under the table.
那农夫狗一直在桌
底下啃骨头。
He was afflicted always with a gnawing restlessness.
他老是被一种叫人苦恼不安情绪折磨着。
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