gōng / chéng / shī / dǎ / kāi / hēi / hé / hòu / zhōng / yú / zhǎo / dào / le / shè / bèi / gù / zhàng / de / yuán / yīn

工程师打开黑盒后，终于找到了设备故障的原因。

After opening the black box, the engineers finally found the cause of the equipment failure.