the fact of being unable to read or write 文盲: 无法阅读或书写The illiteracy rate on the island is still unacceptably high. 该岛的文盲率仍然高得令人无法接受。 movements to eradicate illiteracy 扫盲运动
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the fact of knowing very little about a particular subject area (对某学科)了解不多的,外行的 economic/scientific illiteracy 经济/科学文盲