急：唔該幫我譯做英文丫．．．20分．．．

英國果邊既公司想我地寄200本書過去, 但係我地香港既總公司只係淨番340本, 如果寄200本比佢地, 我地會唔夠用, 所以只可以寄180本比佢地

English translation :

I understand that our branch company in England wants us to send them 200 books. However, the Hong Kong headquarters only got 340 books in stock, we have to leave a sufficient number of books for our use, so we only send you 180 books.