The ancient civilization fellinto oblivion.古代的文明被遗忘了。Two hermits lived in a cave far from civilization.两个隐士连个隐士住在远离村庄的山洞里.People have no letters at the primary stage of civilization.在文明的初期, 人类是没有文字的。Some records of ancie...
Brittleness is often a result of alloying.脆性往往是合金化的一种结果.Meanwhile, inherent brittleness of urushiol has limited its development and application.同时, 漆酚清漆固有的脆性等也限制了其发展和应用.However, there are not consistent brittleness index...