他们觉得很累
They feel very tired
以上为机器翻译结果，长、整句建议使用 人工翻译 。
这里的学生所学的科目范围很广，所以有时候他们觉得很累。
Students here study a broad range of subjects, so sometimes they feel really tired.
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他们觉得很累，所以停下来休息。
They felt very tired, so they stopped to have a rest.
他们决定停下来休息一下，因为他们觉得很累。
They decided to stop and have a break, for they were feeling quite tired.
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