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1.check vt.检查，核对
Check the oil at regular intervals, and have the car serviced regularly.
定期检查汽油，并对车辆进行定期维护。
2.mental adj.内心的，精神的
Attitudes to mental illness have shifted in recent years.
最近几年对精神病的态度已有所改变。
3.depression n.萎靡不振，沮丧
Depression lowers the human ability to cope with disease.
抑郁症会降低人体对疾病的抵抗力。
4.initially adv.开始；最初
Initially the government was unwilling to accept the defeat.
最初政府不愿意承认失败。
5.symptom n.症状；征兆
One prominent symptom of the disease is progressive loss of memory.
这种疾病的一个显著症状就是记忆逐渐丧失。
6.onset n.开始，动手；[医]发病
The drug must be taken from the onset of the infection.
这种药必须在感染的最初期就开始服用。
