It is said that most adult second language learners will be lucky toIt is said that most adult second language learners will be lucky to acquire 5000 words even after several years of study .In comparison a native speaker can usually have 20000 word.

It is said that most adult second language learners will be lucky toIt is said that most adult second language learners will be lucky to acquire 5000 words even after several years of study .In comparison a native speaker can usually have 20000 word.
It is said that most adult second language learners will be lucky to
It is said that most adult second language learners will be lucky to
acquire 5000 words even after several years of study .In comparison a
native speaker can usually have 20000 word.
This relaticely slow progress has less to do with aptitude than with
exposure.It has been calculated a classroom learner would need 18
years of classroom exposure to supply the same amount of vocabulary
input that occurs in just one year of natural settings.
How many words does a learner need to know?One figure that is ofren
quoted is 2000.This is around the number of word that most native
speakers use in their daily conversation.It is also the size og the
defining vocabulary used in dictionaries for language learners.
In fact,the most frequent 100words in English make up 50 percent of
most texts.These include grammar or function words such as "has",but
not content words like "answer"

It is said that most adult second language learners will be lucky toIt is said that most adult second language learners will be lucky to acquire 5000 words even after several years of study .In comparison a native speaker can usually have 20000 word.
translation:
成年的第二语言学习者在五年时间里掌握其5000个单词算是幸运的了,相比之下使做该语言为母语者,同样时间里会掌握20000个单词.
与其说这种相对漫长的进步与学习态度有关倒不如说是与只靠呆在教室学习有关更好.据统计,在教室花上18年学到的词汇和使用此语言的居民一年内扩充的词汇量是相等的.
那么对一个学习者来说多少个词汇才算够呢?有人指出,2000个围绕着该语言使用者的日常生活和对话的词汇就够了.这2000个词汇还包含该语言学习者查阅词典时能看得懂的注释.
其实,最常见的100个词构成了很多文中50%的字词.此中包含语法和虚词,像“has”呀什么的,但是不包含如“answer”等实词.
PS.你是要翻译吗?

你这话明显没有说完啊, "据说,多数的成年外语学习者会幸运的....."

有种说法：大部分熟练掌握第二语言的人会很幸运地。。。。

To what?