The children sampled spent a quarter of their rapidly decreasing "free time" watching television.
被抽样调查的儿童把他们迅速减少的“空闲时间”的四分之一都花在了看电视上。
If the time intervals are controlled, the system is termed a sampled-data system.
如果时间间隔是可控的，称之为采样系统。
If the time intervals are controlled, the system is termed a sampled-data system.
如果时间间隔是可控的，称之为采样系统。
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