As many as half remained illiterate or semi-illiterate in both Vietnamese and English and never became U.S. citizens.

多达一半的人仍然是越南语和英语的文盲或半文盲，永远也成不了美国公民。

youdao

Illiterate and semi-illiterate population in this table refers to the population aged 15 and over, who are unable or very difficult to read.

注： 本表“文盲、半文盲人口”指15岁及15岁以上不识字及识字很少人口。

youdao

According to UNESCO, a CLC is as a community-based non-formal educational institution or organisation which provides a range of services and learning opportunities to out-of-school children, youth and illiterate or semi-literate adults from socially disadvantaged rural and urban communities.

UNESCO: Community Learning Centres