The format of quoted sentences in English papers is just like an old saying. Quote other people's opinions, either directly or indirectly. In any case, the author of the paper must indicate the author and source of the quoted text. At present, the common practice in American academic circles is to indicate the author and source of the quotation in brackets after the quotation.

Extended data:

English title method

(1) English titles mainly appear in the form of phrases, especially noun phrases, that is, titles basically consist of one or several nouns plus their prepositions and/or postattributes; The title of phrase type should determine the head word and then modify it before and after. The order of each word is very important, and improper word order will lead to inaccurate expression.

(2) Generally don't use declarative sentences, because the title mainly plays a marking role, and declarative sentences are easy to make the title judgmental, not refined and not eye-catching. In a few cases (critical, comprehensive and refuting), the question can be used as the title, because the question has an exploratory tone and is easy to arouse the reader's interest.

The English title and Chinese title of the same paper should be consistent in content, but it does not mean that the words should correspond to each other. In many cases, individual non-material words can be omitted or changed.

④ Foreign sci-tech journals generally have restrictions on the number of words in titles, and some stipulate that titles should not exceed 2 lines, and each line should not exceed 42 printed symbols and spaces; Some require that the title should not exceed 14 words. These regulations can be used for our reference.

⑤ In the English title of the paper. Anything that can or can't be used is not used.

Reference: Baidu Encyclopedia-Paper format