自然界的平衡往往比人类设计的系统更复杂,也更脆弱。Zìránjiè de pínghéng wǎngwǎng bǐ rénlèi shèjì de xìtǒng gèng fùzá, yě gèng cuìruò.The balance of the natural world is often more complex, and more fragile, than systems designed by humans.
人类应该尊重自然界,与动物和植物和谐相处。Rénlèi yīnggāi zūnzhòng zìránjiè, yǔ dòngwù hé zhíwù héxié xiāngchǔ.Humans should respect the natural world and live in harmony with animals and plants.
科学家一直在研究自然界的种种奇妙现象。Kēxuéjiā yīzhí zài yánjiū zìránjiè de zhǒngzhǒng qímiào xiànxiàng.Scientists have always been studying the many wonderful phenomena of nature.