求翻译：所以，在背诵和复述时，一定要掌握所背诵的每个句子的语义、结构和交际功能，掌握课文中每个单词的词义和用法，并能够自如地利用课文中的句子、单词、语法形式进行不同交际功能和不同表达结构的替换练习，直至能自如地将课文中的句式、单词、语法形式行等运用来交际表达中去。就是说，背诵和复述课文的基本要求在于完全理解课文，其真正目的在于掌握课文中所有知识点的语义和用法，并能够灵活运用于交际表达中。是什么意思？

So, when memorize and repeat, we must grasp the semantics, structure and communicative function of the recitation of each sentence, to grasp the meaning and usage of each word in the text, and be able to freely use the sentence in the text, vocabulary, grammar form different communicative functions

Therefore, in memorization and repetition, be sure to get the recitation of each sentence of the semantics, structure, and communication features, with texts from each word in meaning and usage, and to be able to move freely in the texts to use sentences, words, grammatical forms for different funct

So, in reciting and retelling Shi, must to master by reciting of each sentences of semantic, and structure and communication features, master texts in the each word of meaning and usage, and can freely to uses texts in the of sentence