American naturalism originated from realism.

美国自然主义源于现实主义。

American naturalism: American naturalism was a new and harsher realism.

美国自然主义：美国自然主义是一种新的、更具批判性的现实主义。

Although naturalism had not become an obsession among american writers by 1914, it clearly commanded the allegiance of a majority of serious young writers.

到1914 年，虽然自然主义在美国作家中没有成为一种固定的观念，但它明显得到多数严肃青年作者的忠诚。

The first chapter of the thesis gives a brief introduction to the naturalistic theories and practices in American literature and the main features of Steinbeck's naturalism are expounded.

本文第一章介绍了美国文学史上自然主义的理论和实践并阐释了斯坦贝克作为自然主义作家的特点。

Naturalism has become one of chief features of contemporary American philosophy.

自然主义已经成为当代美国哲学的重要特征。