英语翻译句子的大概意思表达是：一个四川地震的灾民在面对采访时,对于痛失亲人的这件事,并没有好像大多数灾民那样的痛哭流涕,

here "低调平淡" is absolutely not "careless",or "absent-minded"。It is an appearance of "calmness after a huge blow" or "helplessness"。