71．invent vt．＝plan or make sth．new，意为“发明；创作；创造”。例如：Who invented the steam engine？谁发明了蒸气机？Alexander Graham Bell invented the telephone in 1876．一八七六年阿历山大·格雷厄姆·贝尔发明了电话。
72．invite vt．＝ask sb．to do sth．or to go somewhere，意为“邀请；招待”。例如：My parents want to invite you to dinner．我父母想请你吃饭。She invited us to her birthday party．她邀请我们参加她的生日聚会。Mr King invited my father to his house．金先生邀请我父亲到他家做客。Let's invite Miss Evans to sing．咱们请埃文斯小姐唱首歌吧。
73．just adv．①＝exactly；not more or less，意为“刚才；正好；恰好”。例如：It's just two o'clock．现在正好两点。They've just arrived．他们刚刚到达。The bell just rang．铃刚响过。It is his birthday．He is just ten years old．今天是他的生日，他正好10岁。That is just what I think．那正是我所想的。②＝only表“仅仅；只是”。如：Give me just a little．就给我一点点。He is just a child．他不过是个孩子。Just a moment！请稍等一下。I rang up just to say hello．我打电话只是问候一下。
74．just now ＝at this moment；a short time ago；意为“就在此时；刚才”。例如：He is rather busy just now．他此时相当忙。He is not at home just now．他此时不在家。I saw him just now．我刚才见过他。He left just now．他刚刚离开。
75．keep（过去式和过去分词是kept ／kept ／；kept）vt．①＝cause sb．or sth．remain in a certain state，意为“使……处于某种状态”。例如：Keep the baby warm．别把婴儿冻着。You must keep your hands behind your backs．你们必须把手放在背后。I'm sorry to have kept you waiting for a long time．对不起，让您等了这么久。②＝continue to have；not give away；not lose；意为“保存；保留；保持”。例如：I keep old letters．我保存旧信。You may keep this book．这本书你留下吧。Keep still while I take your picture．给你拍照时，你不要动。③＝pay proper regard to，意为“履行；遵守”。例如：He keeps to his promise．他守约。 She always keeps his words．她决不食言。④＝support；look after意为“赡养；供养；饲养”。例如：My father keeps a big family．父亲养活着一大家人。to keep a dog养狗。Farmers usually keep chickens in their backyard．农民们通常在自己的后院养鸡。⑤＝do sth．continuously，repeatedly，意为“继续不断（做某事）”。例如：The baby kept crying．那婴儿不停地在哭。⑥＝often write things in a book，意为“记（日记；帐等）”。例如：He keeps a diary in English．他用英语写日记。
keep＋复合宾语，通常由形容词、介词短语等做宾语补足语。意为“保持……某种状态”。例如：
You must keep the classroom clean．你们必须保持教室内清洁。
The other students must keep their eyes closed．其他的孩子必须闭上眼睛。
Farmers usually keep chickens in their backyard．农民们通常在自己的后院养鸡。（介词短语做宾语补足语。）
