80％需要就医的五岁以下儿童以前都没有出现过健康问题。

More than 80% of the under-fives who ended up in hospital had no previous health problems.

youdao

80％需要就医的五岁以下儿童以前都没有出现过健康问题。

More than 80% of the under-fives who ended up in hospital had no previous health problems.

youdao