我有这么多朋友，但是内心深处我还是有一种对孤独的恐惧。

I have so many friends, but deep down, underneath, I have a fear of loneliness.

《柯林斯英汉双解大词典》

被确定为具有高度焦虑、恐惧、愤怒、抑郁和孤独的主人养的猫更有可能有行为问题。

Owners defined as individuals with high levels of anxiety, fear, anger, depression and loneliness were more likely to have cats with behavioural issues.

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它使学生感到孤独，不开心和恐惧。

It makes students feel lonely, unhappy and afraid.

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