Dog
Your dog actually loves you,not just because you give them food and walks.
你的狗狗很爱你，并不仅仅因为你是饲主还带它遛弯。
Studies that measured oxytocin levels,heart rates,and other biometrics showed that levels of bonding hormones rose and heart rates fell in both humans and their dogs after interacting with each other.
催产素水平、心率和其它生物测定学的数据表明，人和狗狗的互动会提升双方的融合激素水平并延缓心率。
In other words,when you pet your dog,both of you produce more of the same hormone in your brain that makes you fall in love with people,and both of you relax more.
换言之，当你爱抚狗狗时，你们的大脑会产生同样的荷尔蒙，变得更加放松。
Dolphin
Dolphin mothers sing to their babies while they're in the womb.
海豚妈妈给它们未出生的宝贝唱歌。
According to a study at the University of Southern Mississippi,dolphin mothers will make a"signature whistle"for the benefit of their calf while it's in the womb.This whistle is thought to act as a sort of"name"for the mother,allowing the calf and mother to locate each other easily once it's born.
南密西西比大学的一项研究表明，当海豚宝宝还在妈妈的子宫里时，海豚妈妈会发出一种“标志性哨声”代表自己。宝宝出生后，母子就可以凭借哨声轻松找到对方。
After the calf is born,other nearby adult dolphins will whistle less,likely to help the calf learn and use the right whistle.
同时，附近的成年海豚会减少发出哨声，帮助海豚宝宝学习使用正确的哨声。
Squirrel
Hundreds of trees become seedlings every year because of squirrels forgetting where they buried their food.
因为松鼠常忘记自己埋藏食物的地点，所以地球每年多长出数百颗小树苗。
According to Rob Swihart,a professor of wildlife science at Purdue University,gray squirrels bury their food(nuts,acorns,etc.)all over the place but often forget to dig them back up.Those buried seeds have a good chance of becoming full-grown trees.
美国普度大学野生生物专家Rob Swihart称，灰松鼠到处埋藏坚果和橡子等，却经常忘记挖出来吃掉，不过这些种子也获得了长成大树的机会。
Fish
Some fish can recognize their owner's face.
一些鱼能认出主人的脸。
Fish can learn to recognize their owner.People have a misconception that fish can't see out of the glass of their aquariums,but the reality is that they have surprisingly good eyesight.They also tend to have different personalities.For example,some fish like to be petted.
鱼可以学习认出它们的主人。人们常误以为鱼不能透过水箱看到外面的东西，其实它们的视力却出奇的好。不同的鱼还有不同的个性特点，比如有的鱼就喜欢被爱抚。
Seahorse
Seahorses get"married".
海马会成双结对“结婚”。
Seahorses tend to be monogamous and will intertwine their tails to stick together while floating through the ocean.Is it because they're cute and loving,or is it just an evolutionary aspect of their species?
海马倾向一夫一妻制，当它们在海洋中浮游时，它们的尾巴常会缠绕在一起。这是因为它们可爱而有爱，还是物种进化的一个特征而已?
The truth is,seahorses are pretty bad swimmers and spend a lot of time hiding from predators.Finding a mate for life boosts their chances of successful reproduction.
实际上，海马不善于游泳。它们会花很多时间来躲开捕食者。找到终身伴侣可以增加它们成功繁殖的机会。
