我舒舒服服地躺在他臂弯里，像往常一样开始犯困。

I lay comfortably in his arms and I begin to feel sleepy as usual.

胃里太饱我会犯困的.

Too full a stomach will make me drowsy.

春天里人们容易犯困.

People are inclined to sleep more in spring.

并不是每个上班犯困的人都是懒散的.

Not everyone who is sleepy at work is lazy.

由于窑洞内太温暖，田很难专注而且经常犯困。

She often felt sleepy as the cave house was too warm for her to concentrate.

他喝了咖啡没多一会儿，就犯困了。

No sooner had he drunk the coffee than he began to feel drowsy.

小明觉得数学课很枯燥,所以一上数学课就犯困.

Xiao Ming finds the math class boring and feels sleepy whenever he has one.

我知道，但是我保证明天不犯困。我学习很努力的。

Son: I know, but I promise I won't be sleepy tomorrow. I work really hard.

这音乐让我犯困.

This music makes me nod off.

就是说，你犯困了。咖啡因是腺苷受体拮抗剂。

In other words, you get sleepy. Caffeine is what's called an adenosine receptor antagonist.