obsequious a.谄媚的 例如：When "never act obsequious to your boss" has always been an golden rule in Eren's self-discipline, however,corporol Levi was the only exception.
precedent n.先例 = tradition
propriety n.礼貌，得体 = decent
grandiose a.庞大的，浮夸的 ---grandiosity n.
miliue n.社会环境，背景 如：Eren slowly acknowleged that one cannot understand Levi ignoring his special milieu --known as the dark time back in slum.
incur v.招惹麻烦，负债 例如：The worst debt Levi ever incured on him was his words to the brat who barly understood them.
combat v.斗争 例如：armed combat 武力斗争（流血斗争）