In emergency condition, the first objective is to operative security, secondary is economically.

而在紧急情况下，首要目标是运行的安全性，其次才是经济性。

youdao

In emergency condition, the first objective is to operative security, secondary is economically.

而在紧急情况下，首要目标是运行的安全性，其次才是经济性。

youdao