diller（1978）发现，随着学习者词汇量的增加，他们与可识别的文

Diller (1978) found that as learners' vocabulary increases, they are log-normally distributed with recognizable text words. Specifically, if you need to recognize 78% of the text content of each page, learners need to master 2500 words. To recognize 86% of the text content of each page, 5000 words are required. The higher the recognition rate thereafter, the higher the vocabulary required will be than before. For example, to recognize 92% of the text content on each page, you need to master 10,000 words. If you can recognize the remaining 8% of low-frequency words, you need to master at least 20,000 words.

Diller (1978) found that as learners' vocabulary increased, they were normally distributed in pairs with recognizable text words. Specifically, if you need to recognize 78% of the text content per page, learners need to master 2,500 words. Identify 86% of text content per page and need to master 5,000 words. The higher the recognition rate, the higher the vocabulary requirements required. For example, to recognize 92% of text content per page, you need to master 10,000 words. If you can identify the remaining 8% of low-frequency words, you need to master at least 20,000 words.

Diller (1978) found that with the increase of learners' vocabulary, they are lognormal distribution with recognizable text words. Specifically, if you need to recognize 78% of the text content per page, the learner needs to master 2500 words. It takes 5000 words to recognize 86% of the text content on each page. After that, the higher the recognition rate, the higher the requirement of vocabulary. For example, to recognize 92% of the text content per page, you need to master 10000 words. If you can recognize the remaining 8% of low-frequency words, you need to master at least 20000 words.<BR>