每日口說挑戰咖啡對大腦做了什麼事！？

However, you’d have to drink those cups all at once, making it effectively impossible to overdose on caffeine from coffee.
然而，你必須一口氣喝下那些咖啡，這讓你有效的無法從咖啡中攝取過量的咖啡因

effectively 有效的(adj)
overdose 過量(n)
caffeine 咖啡因(n)

However, you’d have to drink those cups all at once, making it effectively impossible to overdose on caffeine from coffee.