I don't think caffeine has much effect on my body.

我认为咖啡因对我的身体没有多大效果。

His illness prevented him from taking any caffeine.

他的病使他无法服用任何咖啡因。

I like drinking drinks without caffeine.

我喜欢喝没有咖啡因的饮料。

Long-term dependence on stimulants such as caffeine can disrupt your sleep schedule.

长期依赖咖啡因等兴奋剂会扰乱你的睡眠作息。

Stimulants like caffeine can help boost your energy and improve your athletic performance.

像咖啡因这样的兴奋剂能帮助激发你的能量，提升你的运动表现。

Caffeine overstimulates certain people to the point that they find it hard to focus.

咖啡因对于某些人来说会产生过量刺激，使他们没办法集中精力。

Contrary to popular thinking, dark roast coffee actually has less caffeine than light roast.

与大众的认知相反，深烘焙咖啡含有的咖啡因实际上比浅烘焙的更少。

Caffeine can cause palpitations and headaches.

咖啡因能引起心悸和头痛。

Tea contains caffeine. It's bad for your health.

茶含有咖啡因，对你的健康不利。

It is a well-known fact that caffeine is a stimulant.

咖啡因是兴奋剂，这是人所共知的事实。

As little as 50 mg of caffeine can produce pharmacological effects.

仅仅50毫克的咖啡因就能产生药理效果。

Caffeine is the active constituent of drinks such as tea and coffee.

咖啡因是茶和咖啡这类饮品的活性成分。