A【51】of foreign words still look like foreign words; there are often expressions which【52】originally used by people who wanted to sound particularly well-educated. It was the desire to be scholarly that brought【53】a wave of Latin terms which appeared in the 16th century【54】the Humanist movement brought new impetus to learning throughout Europe.【55】such as, e. g. (from the Latin meaning a voluntary example); PS (meaning' added after the latter has been written' ); a.m. and【56】( meaning 'before noon' and' after noon' ) came into the language at this time. Nowadays they are【57】common that most people don't even know【58】the letters actually stand for and there's certainly nothing learned about using them today ! In addition to the words brought to English【59】foreigners, there are plenty of words which the British have collected from the countries they have settled in all【60】the world. There are even a few Chinese words, which I’m sure a Chinese speaker would recognize from the way we pronounce them:' typhoon' is a great wind; 'to kow-tow' is to bow down low; a 'sampan' is a small wooden boat. Over 5,000 of the words in common use in English today are words of foreign【61】. Some of them are clearly recognizable【62】foreign like 'au pair' or 'rendezvous';【63】now look so English that only a language historian knows【64】they came from. So English is in a state of permanent development. Both in Britain and abroad it is gaining【65】words and expressions, and dropping and changing old【66】. Words changes their meaning, and they go in and out of fashion【67】hairstyles. Nobody knows all the four million words that are said to exist; a well-educated person probably【68】under 20,000. So don't be surprised if you never encounter some of the expressions that still appear in school textbook; and next time you hear somebody using a strange word you haven't heard【69】, you can comfort yourself that there may well be a native speaker somewhere who doesn't know it【70】. (51)