备忘：将200克稀硫酸与足量锌反应,假反应后生成的氢气全部与氧化铜反应,可将40克氧化铜全部还原为铜...

On formal occasions,invitations are usually required as a courtesy and a reminder for guests.The content of the invitations should include the time,place,and form of the activity and the name of the host.No punctuations are needed.People,units and the activity should be called by full names.The invitation can be either printed or hand-written with a clear and beautiful handwriting.As for the format,Chinese and other countries' invitations are quite different,so it is important to have an appropriate translation.Usually,the names of the people,the time and the place can be stated with a brief description of the background.Casual meals don't require invitations if confirmed,nor does work meals.
纯手打,

Dear Lily：
Do you want to learn about my summer holidays?Well,on July 4th .It is Saturday.I visit grandparents'house with my parents.From July 6th to 19th,I have summer camp for two weeks.It is very funny.Oh on July 22nd .It is Wednesday,it is my birthday.Do you want to be in my birthday party
Love
Dave