from/by experience　 凭经验，从经验中(得出)

　　(2)experienced adj. 有经验的，熟练的

　　be experienced at/in 在......方面有经验

　　①Please tell me your experience in the flood.

　　请告诉我你在那次洪水中的经历。

　　②He is very experienced at/in mending cars.

　　他修车很有经验。

　　③She has become quite experienced (experience) at/in teaching primary school students.

　　她教小学生已经很有经验了。

　　[名师点津]　experience作"经验"讲时，为不可数名词，其前可以用little, much等来修饰；作"经历"讲时，为可数名词。

　　④He had many interesting experiences (experience) while travelling in Africa.

　　他在非洲旅行时，有许多有趣的经历。

　　[语境串记] 　Mr. Smith is an officer with experience, who has many odd experiences. Even he has experienced what death means.

　　史密斯先生是位有经验的军官，他有着很多奇怪的经历。他甚至体验过什么是死亡。

　　2．(教材P21)For example, what causes them?

　　例如，它们是如何发生的？

　　cause vt.引起；造成 n．原因；事业

　　(1)cause ... to do sth.　 引起......做某事

　　cause sb. sth. 引起某人某事；给某人招致某事

　　(2)cause and effect 因果

　　①Sorry to have caused you so much trouble.

　　对不起，给你带来如此多的麻烦。

　　②The bad weather is causing (cause) problems for many farmers.

　　恶劣的天气给许多农民造成了困难。

　　③His illness caused him to_miss (miss) the game.

　　他因病错过了那场比赛。

　　④Can you tell me the cause and effect of it?

　　你能不能告诉我它的前因后果？

　　[辨析比较]　cause, reason, excuse

cause 表示"直接原因"，后面常接介词of reason 表示"解释某个行为的理由"，后面通常接介词for或why引导的定语从句