The eustachiantubes get longer and usually work better in older kids, but they can still cause problems.
对于大一些的孩子,虽然耳咽管会更长一些,可以更好的发挥作用,但是还是会出现问题。
2
When you were young, especially before you turned 3, the eustachiantubes were very small and less able to keep germs out.
当孩子小的时候,尤其是三岁以下的儿童,耳咽管非常短,不能有效地将微生物阻隔在外面。
3
There is good evidence that if baby is given a bottle of formula while lying flat, the formula can get into the Eustachiantubes and middle ear and cause an infection.