gài cè fǎ / suī rán / bù gòu / jīng què / dàn / zài / chū bù / guī huà / shí / fēi cháng / shí yòng

概测法虽然不够精确，但在初步规划时非常实用。

Although the rough-and-ready method is not very precise, it is very practical in preliminary planning.