当交互供油系统打开时，一个燃油泵可以向两台发动机供油。
A When the cross-feed system is open, it is possible for one fuel pump to supply fuel to the two engines.
B When the supplying system is open, it is possible for one fuel pump to supply fuel to the two engines.
C One fuel pump can supply fuel to two engines, as the supplying system is open.