看贴子总是有人提起11么意思?

Dear marry,
After reading your letter,I know that you worry about your life
here at school.
Don't worry,Marry.It's common that when you com to a new
country,you will be faced with a lot of challenges like language learning.I
should say,our students here are really nice and helpful.Besides,you can ask
your teachers for help when you meet with problems.They love their students,even
those from abroad.
In my opinion,you should learn to be brave and try to
communicate with your classmates.The closer you stay with them,the more they
will understand you.your confidence will grow as you get to know them,and you'll
certain find that you have many friends.
have a good time in
China!
Yours,
Li Hua

　　在浩瀚的宇宙空间原本是无所谓上下之分的　　小时候,仰望着夜空中的点点繁星,总会让人产生许多美丽的遐想和疑问,比如,天上的日月星辰为什么不会掉下来呢?美国人在我们的脚下,头朝下倒挂在地球上生活不难受吗?等...

贴吧：post bar
贴子：post

posts bar
post/thread

Strengthen tendons

I went to the countryside to spend my summer holidays this year. I liked green plants, clear rivers and lovely amimals there.I breathed the fresh air on the mountain and sometimes I went swimming in the river. I kept a diary every day.
I liked not only the scene of the countryside, but also the people there. I helped them to do farm work. I also helped the children in the neighbourhood with their lessons. The children were interested in English. They were good at reading and writing, but did not do well in listening and speaking. I helped them improve their listening and speaking. Their parents thought highly of me. I realized that knowledge is greatly needed in the countryside.
今年我去农村过暑假.我喜欢那儿绿油油的植物,清澈的小河和可爱的动物.我在山上呼吸新鲜的空气,有时在河里游泳.我每天记日记.
我不仅喜欢那里的景色,而且喜欢那里的人.我帮他们干农活,帮助邻家的孩子复习功课.孩子们对英语很感兴趣,他们在读、写方面很好,但听、说不好.我帮助他们提高听、说能力,他们的父母高度赞扬了我.我意识到农村确实需要知识.

Dear Alan,
First I want to tell you that many students have the same problem like yours.
In fact maths is not as difficult as you think. Just think it over. You may have problems with the way you learn. You’d better get everything ready before class and try to write down the difficult points in the new lesson. You have to listen carefully when you’re in class. It can help you understand the lesson better. Don’t forget to take notes if necessary. You also need to review the lessons after class. And try to do a bit more exercises if you wish. Don’t worry too much about it. Keep trying and you will soon learn it better. Good luck.(

贴子 的英文不是 note,是 thread～
我觉得我是这个贴子里最聪明的人.
I believe that I am the smartest person in this thread.

碳：是一种化学元素(C)
炭：是一类物质的总称,如煤炭,木炭等

什么文字呀!看不见!

事在人为、为人师表、表里如一、一得之见、见仁见智、

没错的,向量的加法要记住首尾相接.
而减法则可以转为加法运算.
比如ob-oa=ob+(-oa)=ob+ao=ao+ob=a