英语语法分析

First, there may be a brief cessation or reduction of breathing when falling asleep as the sleeper waxes and wanes between sleep and wakefulness and their differing control mechanisms.

首先，睡眠者在半梦半醒及不同调节机制之间转换时进入睡眠状态，呼吸可能短暂地停止或减少。

The moon waxes till it becomes full, and then wanes.

月亮渐盈， 直到正圆，然后消亏。

《新英汉大辞典》

These comprise asphalt, tar and waxes.

其中包括沥青，焦油和蜡。