Children in famine, victims tortured by oppressors, helpless old people a hated burden to their sons, and the whole world of loneliness, poverty, and pain make a mockery of what human life should be. I long to alleviate the evil, but I cannot, and I too suffer. ①请问这里的a hated burden to their sons是作helpless old people的同位语吗，不需要前后用逗号隔开吗？ ②请问这里的I too suffer，too可以直接放在动词之前修饰动词吗？