You know,maybe I'll put together some photos of Grandpa as a welcome present.
我说,或许我把爷爷的一些照片组合起来,作为欢迎他的一份礼物。
if there is any effect of noise upon mental health it must be so small that present methods of psychiatric diagnosis cannot find it.
如果噪音对精神健康有影响的话,那也一定是微乎其微,以致现代的精神病诊断方法还发现不了。