monosodium gluetamate （味精）

Biologist studies frogs

A noted biologist, who had been studying little green frogs in a swamp, was stumped. The frog population, despite efforts at predator control, was declining at an alarming rate. A chemist at a nearby college came up with a solution: The frogs, due to a chemical change in the swamp water, simply couldn't stay coupled long enough to reproduce successfully. The chemist then brewed up a new adhesive to assist the frogs' togetherness, which included one part sodium. It seems the little green frogs needed some monosodium glue to mate.

为不懂英文的朋友翻译一下：

生物学家 发现河塘的青蛙 急剧减少。用什么措施都无效。

附近的一个化学家发现原来是因为水中化学成分的改变，是青蛙交配时，配在一起的时间不够长。

于是他配出一种含钠的胶，使青蛙交配时彼此粘在一起，以延长交配时间。看来青蛙是需要一种：

单钠（monosodium)的胶(glue) 来（to）交配（mate）

英文的发音即为：
monosodium glutamate （味精）