PENNSTATE UNIVERSITY COLLEGE of the LIBERAL ARTS http://elearning.la.psu.edu/aplng/802/lesson-3/5.1-communicative-competance
second language acqusitiion methods SLA https://slaencyclopediaf10.wikispaces.com/
http://thencomesfamily.com/community/forum
minimal pairs http://www.manythings.org/pp/
https://www.espressoenglish.net/minimal-pairs-english-pronunciation-exercises-vowels/
http://www.fonetiks.org/shiporsheep/page1.html
https://magoosh.com/toefl/2016/practice-listening-pronunciation-minimal-pairs/ https://magoosh.com/toefl/2016/tongue-twisters-native-chinese-speakers-short-long/
http://www.businessenglishresources.com/
english uk http://www.englishuk.com/
https://didactics-a.wikispaces.com/
https://archive.org/
http://www.rhymesworld.com/id19.html http://www.blogtalkradio.com/rhymesmediagroup
grammar http://www.perfect-english-grammar.com/
https://www.thebalance.com/
the dot dash https://www.dotdash.com/
thoughtco https://www.thoughtco.com/what-is-eurasia-1435090
british council https://learnenglish.britishcouncil.org/en
royal of uk https://www.royal.uk/
scholars at risk https://www.scholarsatrisk.org/
vub today http://www.vubtoday.be/en/
petitions https://www.change.org/start-a-petition
art http://deeprootsmusic.ca/
medical dictionary https://medlineplus.gov/hivaidsmedicines.html
computer term dictionary https://www.computerhope.com/
business dictionary http://www.businessdictionary.com/
DIABATES http://www.theictm.org/big-diabetes-lie/?hop=manuovi
INTA http://www.inta.org/TrademarkBasics/FactSheets/Pages/ProtectionofOlympicTrademarks.aspx
moac http://www2.warwick.ac.uk/fac/sci/moac/people/students/peter_cock/cygwin/
psychology https://www.psychologytoday.com
编程相关 cygwin安装gcc http://matpack.de/
make a sentence http://use-in-a-sentence.com/english-words/most-used/know.htm
the register https://www.theregister.co.uk/
ieeeghn global history network http://ethw.org/Main_Page
FLUENTU http://www.fluentu.com/blog/english/how-to-improve-english-pronunciation/
quotes https://www.brainyquote.com/quotes/authors/t/thomas_fuller.html
how many syllables https://www.howmanysyllables.com/words/interesting
基础数学读物 math-and-math http://www.math-only-math.com/nature-of-the-roots-of-a-quadratic-equation.html
stackexchange https://languagelearning.stackexchange.com/
opencourse https://www.youtube.com/user/TheNessSeS/videos?shelf_id=0&view=0&sort=dd
杂志 https://www.scientificcomputing.com
https://www.elsevier.com
merriam webster https://www.merriam-webster.com/dictionary/relax
engvid https://www.engvid.com/
Longman Dictionary http://www.ldoceonline.com/dictionary/recipient
Librivox https://librivox.org/
Engfluent http://engfluent.com/english-pronunciation-exercises/
etymonline http://www.etymonline.com
yourdictionary http://grammar.yourdictionary.com/parts-of-speech/nouns/concrete-noun.html
Cambridge Dictionary http://dictionary.cambridge.org/grammar/british-grammar/word-formation/ish-and-y
wiki https://en.wiktionary.org/w/index.php?title=Category:English_nouns&from=ac
wordpress https://guinlist.wordpress.com/tag/recipient-nouns/
grammarist http://grammarist.com/grammar/agent-recipient-nouns/