This is because their bodies cannot metabolise theobromine quickly enough.

这是因为它们无法快速代谢可可碱。

Chocolate contains theobromine, a chemical that is toxic to dogs in large enough quantities.

巧克力包含了可可碱，这种化学物质达到一定数量后，会使得狗狗中毒。

Theobromine appears to help with repairing enamel and protecting teeth from further erosion by acids.

可可碱似乎能修复牙釉质并保护牙齿免收酸性物质的进一步腐蚀。

Apart from being a stimulant, theobromine is also a vasodilator (widener of blood vessels) and a diuretic.

可可碱除了是一种刺激物外，它还有扩张血管，利尿的功效。

By being able to increase heartbeat, while dilating blood vessels, theobromine can help reduce high blood pressure.

因为能加速心跳，扩张血管，可可碱可以帮助降低人体血压。