佛罗里达柑桔有一种天然的甜味。
树木起天然的保护作用，遮挡了阳光的照射。
根本不是人造的，是天然的！
它比天然的要好。
很明显，乙烯是水果中天然的植物激素，使水果成熟。
Ethylene is the natural plant hormone in fruit that makes them turn ripe, apparently.
我们周围是一个天然的场地，非常适合散步、攀岩和骑车。
we are surrounded by a natural playground just perfect for walking, climbing and cycling.
橄榄油，小麦胚芽油、米糠油中也含有天然的角鲨烯，但含量不多。
Olive oil, wheat germ oil, and rice bran oil also naturally contain squalene, albeit in smaller amounts.
我们周围有一个天然的游乐场，非常适合步行、探险、攀岩和骑自行车。
We are surrounded by a natural playground just perfect for walking, caving, climbing and cycling.
不幸的是，你必须随身携带必要的设备，因为几乎不可能找到天然的替代品。
Unfortunately, you must carry the necessary equipment with you, since it's all but impossible to find natural substitutes.
健康的肺部会产生一种天然的抗生素，通过杀死呼吸道表面的有害细菌来保护肺部不受感染。
Healthy lungs produce a natural antibiotic that protects them from infection by routinely killing harmful bacteria on airway surfaces.
当人们参与有助于他人的活动时，他们的大脑会释放出内啡肽，这是一种大脑中天然的麻醉剂，能让人产生幸福感。
When people engage in activities that help others, their brain releases endorphins, the brain's natural opiates, which induce in people a feeling of well-being.
一个更稀奇的推测说，萨科奇先生对于其外祖父的祖国有一种天然的同情，他的外祖父是来自塞萨洛尼基的犹太人。
A more fanciful theory is that Mr. Sarkozy has a natural sympathy for the country that was home to his maternal grandfather, a Jew from Thessaloniki.
这座城堡建在一个天然的绿草如茵的小丘上。
基本上，我们的皮肤变黑了，从而在失去毛发的部位起到天然的防晒作用。
Basically, we turned our skin darker to serve as a natural sun-protector in the place of the hair we lost.
从实质上讲，我们都知道天然的食物，比如水果、蔬菜和全谷类是最适合我们的。
Intrinsically, we all know that whole foods, such as fruit, vegetables, and whole grains are best for us.
“但是我们今天吃的很多自认为是天然的产品，都是以类似的方式生产的。”热诺维斯说。
"But there are a lot of products that we eat today that are considered natural that are produced in a similar manner," Genovese said.
美丽的田野是天然的画幅。
天然的细菌可以生产氢气和甲烷。
我们甚至很少能够命名出天然的。
玫瑰，玛拉告诉我，是天然的止血剂。
黑色和天然的木头色被用来作为点缀。
黑色和天然的木头色被用来作为点缀。
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