He felt sleepiness stealing over him.

他感到昏昏欲睡。

But because it's not adenosine, the" sleepiness" effect isn't felt.

但是，由于咖啡因不是腺苷，所以再怎么积聚你都不会感觉到有睡意。

Betsy plodded along, her head hanging, her eyes all gritty with fatigue and sleepiness.

贝特西拖着沉重的脚步走着，她的头耷拉着，眼睛里充满了疲倦和困倦。

Although napping made no significant difference to feelings of sleepiness, it did help enhance memory.

尽管午睡没有为感觉困倦带来显著差异, 但有助于增强记忆。

That means that they aren't getting that same melatonin-induced sleepiness when daylight started to dim.

这意味着，当日光开始变暗时，它们不会像褪黑素一样引起嗜睡。

A productive morning rewarded with a decent lunch. And then at about 3: 00 pm there comes the irresistible sleepiness.

忙碌了一上午然后美美地吃个午餐。然后在下午3点左右，无法抗拒的困意袭来了。

The phone's artificial daylight, aka blue light, suppresses the production of melatonin, disrupting our feelings of sleepiness.

手机的人造日光，也就是蓝光，会抑制褪黑素的产生，扰乱我们的困倦感。

That's where those unpleasant symptoms come in, starting with the surging temperature, aches and pains, and sleepiness.

这就是那些引起不适的症状来源。体温开始升高, 身体疼痛, 和昏昏欲睡。

I sighed contentedly. The fire was gone, the other pains dulled by a sleepiness seeping through my body.

我心满意足地叹息着。火焰消失了。别的痛楚被一阵席卷我全身的睡意所削弱了。

The research team assessed sleep time and REM cycles, and the subjects self-rated their sleepiness every evening and morning.

研究团队会对睡眠时间及周期进行评估，而受试者每天早晚也要自我评估睡眠质量。