拥有可靠的技能让你在经济低迷时期有所依靠。

Having a reliable skill set gives you something to ___fall ___back ___on during economic downturns.

如果项目失败，我们可以依靠备用计划。

If the project fails, we can ___fall ___back ___on our backup plan.

在没有其他选择的情况下，人们常常依靠他们的基本本能。

In situations with no other options, people often ___fall ___back ___on their basic instincts.