The writer portrays the characters in a lively manner.
Examples (Wiktionary)
Mandarin
植物性饮食
植物性飲食
zhí wù xìng yǐn shí
plant-based diet
Mandarin
说到这里，我想起另一个类似的科学体系——达尔文的物种起源学说，许多人曾指责所谓“适者生存”不过是一种套套逻辑，因为任何生物性状都可以被解释为对环境的适应。
説到這裏，我想起另一個類似的科學體系——達爾文的物種起源學説，許多人曾指責所謂“適者生存”不過是一種套套邏輯，因為任何生物性狀都可以被解釋為對環境的適應。
shuō dào zhè lǐ ， wǒ xiǎng qǐ lìng yī ge lèi sì de kē xué tǐ xì — dá ěr wén de wù zhǒng qǐ yuán xué shuō ， xǔ duō rén céng zhǐ zé suǒ wèi “ shì zhě shēng cún ” bù guò shì yī zhǒng tào tao luó ji ， yīn wèi rèn hé shēng wù xìng zhuàng dōu kě yǐ bèi jiě shì wéi duì huán jìng de shì yìng ．
Speaking of this, I thought another similar scientific system—Darwin's theory of the origin of the species. Many people have criticized the so-called "survival of the fittest" for being a tautology because any biological trait can be explained as adaptation to the environment.