胸膛: chest...
上级: higher authorities, superiors...
犯: to violate, to offend, to assault, criminal, crime, to make a mistake, recurrence (of mistake or sth bad)...
到达: to reach, to arrive...
少年: early youth, youngster, (literary) youth, young man...
引进: to recommend, to introduce (from outside)...
膳食: meal...
冷却: to cool off, cooling...
圆满: satisfactory, consummate, perfect...
月底: end of the month...