zài / zī / liào / bù / zú / de / qíng / kuàng / xià / wǒ / men / zhǐ / néng / cǎi / yòng / gài / cè / fǎ / lái / gū / suàn / jié / guǒ在资料不足的情况下,我们只能采用概测法来估算结果。With insufficient data, we can only use a rough-and-ready method to estimate the result.