另外，维生素a的使用增强了孩子们的免疫力，化学处理过的蚊帐预防疟疾，这些都能减少儿童死亡人数。

Also, vaccinating children against measles has saved many lives. So has the use of vitamin a to strengthen children's immune systems, and chemically treated bed nets to prevent malaria.

youdao

另外，维生素a的使用增强了孩子们的免疫力，化学处理过的蚊帐预防疟疾，这些都能减少儿童死亡人数。

Also, vaccinating children against measles has saved many lives. So has the use of vitamin a to strengthen children's immune systems, and chemically treated bed nets to prevent malaria.

youdao