应钟是古代乐律名。古乐分十二律﹐阴阳各六。古人以十二律与十二月相配，每月以一律应之。应钟与十月相应。
短时间内频繁开关节能灯会降低它的使用寿命：固定安装或安装在房间的节能灯每次至少应亮15分钟后再关闭。
Repeatedly turning CFLs on and off shortens their lifespan: Install CFLs in fixtures or rooms you keep lit for more than 15 minutes at a time.
5-17岁儿童青少年应每天累计至少60分钟中等到高强度身体活动；
Children and youth aged 5–17 should accumulate at least 60 minutes of moderate- to vigorous-intensity physical activity daily.
凭经验估计，每磅鸡肉应烹调20分钟。
As a rule of thumb, you should cook a chicken for 20 minutes for each pound that it weighs.
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