drowsiness是什么意思 drowsiness在线翻译 drowsiness什么意思 drowsiness的意思 drowsiness的翻译 drowsiness的解释 drowsiness的发音 drowsiness的同义词

名词嗜睡; 睡意

1. But even though yawning and drowsiness occur together, no experiment has shown a causal connection.

2. There is no question that yawning occurs most frequently before and after sleep, and the feeling of drowsiness accompanies increased yawning.

3. It is commonly believed that people yawn as a result of drowsiness or weariness because they need oxygen.

4. It is produced at night by the pineal gland at the base of the brain, bringing on drowsiness.