glandular fever
noun (British English)(North American English mononucleosis, informal mono)
[uncountable]a disease that causes the lymph glands to swell (= become large, round and painful) and makes the person feel very weak for a long time 腺热：一种导致淋巴结肿大（变得肿大，圆形和疼痛）并长时间使人感到虚弱的疾病