... free base 自由基；游离碱 frequency of breathing 呼吸频率 full American breakfast 正式的美国早饭 ...
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depth and frequency of breathing 呼吸的深度和频率
Combining the helium and hyperoxia slows down the frequency of breathing while making the air easier to breathe.
氦氧联用减慢了呼吸频率从而使空气更容易呼出。
Another experiment demonstrated that physical exercise, which was sufficiently vigorous to double the rate of breathing, had no effect on the frequency of yawning.
另一项实验表明，体育运动——尤其是剧烈的运动——可以使呼吸频率增加一倍，但这对打哈欠的频率没有影响。
If you can slow down the rhythm of your breathing, the frequency of your heart beat down.
如果能让呼吸的节奏放慢，心跳的频率就会跟着降下来。
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