他又能重新看见这个世界了，这个消息激励着很多盲人。 This is one ofthe reasonswhy many aspiring actors across America try their luck out in Hollywood 这也是为什么全美国那么多有抱负的演员要到好莱坞来试试运气的原因之一。 句中关系副词"why引导的是定语从句.修饰先行词"“reasons"。 I have explained tothe teacher the reason whyl was late this morning 我已经向老师解释了今天早上迟到的原因。 "try. out”意为“试用.试验”，宾语可以是人，也可以是物，表示“在…身上 做试验”时后面要加介词on”。 If you think he is still incapable of the job,you can try him out for some time 如果你觉得他还不能胜任这项工作，你可以试用他一段时间。 The doctor decided to try this new medicine out on white mice first. 医生决定先在白鼠身上试验一下这种新药。 The name Hollywood was already existent long before it became synonymous with amovie powerhouse. 好菜坞这个名字在成为“电影发电站”的同义词之前已经存在很长时间了。 副词long”在句中修饰before',表示“之前很久”。类似的用法还有long after'和"long since”(之后很久、很久以来)。 Her mother died not long after she gave birth to her young siste 她的母亲在生下小妹妹不久后就去世了。 I haven'twritten to my pen-friend long since she wentabroad for further study. 自从我的笔友出国留学以来，我已经很久没给她写过信了。 要注意"long before"”和beforelong”的区别，beforelong”是不久以后”的 意思。 Don't worry.We'll build a new school for the children before long 别担心，不久以后我们会为孩子们建一所新学校。 他又能重新看见这个世界了，这个消息激励着很多盲人。 This is one of the reasons why many aspiring actors across America try their luck out in Hollywood. 这也是为什么全美国那么多有抱负的演员要到好莱坞来试试运气的原因之一。 句中关系副词“why”引导的是定语从句，修饰先行词“reasons”。 I have explained to the teacher the reason why I was late this morning. 我已经向老师解释了今天早上迟到的原因。 “try ... out”意为“试用，试验”，宾语可以是人，也可以是物，表示“在……身上 做试验”时后面要加介词“on”。 If you think he is still incapable of the job, you can try him out for some time. 如果你觉得他还不能胜任这项工作，你可以试用他一段时间。 The doctor decided to try this new medicine out on white mice first. 医生决定先在白鼠身上试验一下这种新药。 The name Hollywood was already existent long before it became synonymous with a movie powerhouse. 好莱坞这个名字在成为“电影发电站”的同义词之前已经存在很长时间了。 副词“long”在句中修饰“before”，表示“之前很久”。类似的用法还有“long after”和“long since”（之后很久、很久以来）。 Her mother died not long after she gave birth to her young sister. 她的母亲在生下小妹妹不久后就去世了。 I haven't written to my pen-friend long since she went abroad for further study. 自从我的笔友出国留学以来，我已经很久没给她写过信了。 要注意“long before”和“before long”的区别，“before long”是“不久以后”的 意思。 Don't worry. We'll build a new school for the children before long. 别担心，不久以后我们会为孩子们建一所新学校