to rely on something when the first option fails
最初の選択肢が失敗したときに何かに頼る (saisho no sentakushi ga shippai shita toki ni nanika ni tayoru)
"If the deal falls through, we’ll fall back on our backup plan."
"もし取引が失敗したら、バックアッププランに頼ることになります。" (moshi torihiki ga shippai shitara, bakkappu puran ni tayoru koto ni narimasu.)
very kind and generous
A security flaw in software that is exploited by hackers bef...
to do something very important that will be remembered
to plan each step carefully for a specific purpose
crazy or extremely worried
to share your deepest feelings or secrets honestly