With nine engines on the first stage, Falcon 9 can reach orbit even if one or more fails.

猎鹰9号的第一级有9个引擎，即使一个或多个引擎故障，它仍然可以到达预定轨道。

youdao

If the first command fails, the second command does run.

如果第一个命令失败，则第二个命令才会运行。

youdao

The default behavior is that only one me is active on one cluster member and will only become active on the other cluster member if the first one fails (see Figure 3 above).

缺省行为在于，仅有一个ME在一个集群成员上是活动的，并且仅当第一个集群成员失败时才会在另一个集群成员上变为活动的(请参见上面的图3)。

youdao

But if the first commitment fails, so may the second.

ECONOMIST: Manufacturing's future

Would she really walk away from the altar if Will refused to commit a certain percentage of his fortune to her if the marriage fails in the first five years with increased sums at ten, fifteen and twenty?

FORBES: Why Will and Kate Don't Need a Royal Prenup

Eager new angel investors are willing to throw money at any project that appears to involve a strong developer or two, trusting that even if the investment fails, having first shot at subsequent projects the talent gets into, will be worthwhile.

FORBES: The Rise of Developeronomics