for sale是待售的意思
eg：There are a lot of goods for sale
on sale是打折的意思
eg：The first of the new computers may be on sale in the new yea
for sale与on sale~的区别与用法?（给个例句）
for sale是待售的意思
eg：There are a lot of goods for sale
on sale是打折的意思
eg：The first of the new computers may be on sale in the new yea