Relationships are tough, aren't they?

维持感情可真难是吧
You should be in bed, Oliver.

你应该去睡觉了奥利弗
Tonight, I stumbled across

今晚我偶然在
an encyclopaedia entry on ultrasound.

百科全书上发现了超声波的解释
Ultrasound is a sound vibration too high frequency to be audible.

超声波的声音振动频率太高人耳听不到
It was first developed to locate submerged objects -

它首先被用来定位水下的物体
submarines, depth charges, Atlantis and such.

被用在潜艇深水炸弹海底岛屿上
Some animals, like bats, dolphins and dogs

有些动物像蝙蝠海豚和狗
can hear within the ultrasonic frequency.

可以听到超声波
But no human can.

但是人类听不见
No one can truly know what anyone thinks or feels.

没人能真正知道其他人的想法和感觉
What's inside Mum?

妈妈在想什么