gōng / chéng / shī / gēn / jù / dàn / zhuó / diǎn / pàn / duàn / pào / huǒ / lái / zì / nǎ / gè / fāng / xiàng

工程师根据弹着点判断炮火来自哪个方向。

The engineers determined the direction of the artillery fire from the points of impact.