adj.不合适的；错误的；不道德的
It's improper for parents to put too heavy duties on their children. 父母让孩子承担的责任太多是不合适的。
Fixed CTDs caused by improper buildings in several cities.All cities have now been checked and are CTD-free. 修正了若干城市中不合适的建筑，这些城市现在不会出现跳出现象。
Sometimes, improper use of words can cause big trouble. 有时，错误的言辞会引起很大的麻烦。
