| 单词 | 系统活动 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔play〕A complex system of muscles is brought into play for each body movement.每次的身体运动都需要复杂的肌肉系统活动。朗文当代〔sedative-hypnotic〕A drug, such as a barbiturate or antianxiety agent, that depresses the activity of the central nervous system and is used to relieve anxiety and induce sleep.安眠镇静剂：可抑制中枢神经系统活动的药物，如巴比妥剂或抗焦虑剂，并用来缓和焦虑和改善睡眠美国传统 |
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