Course of action taken when all other methods or attempts have failed, a last alternative
在所有其他方法或尝试都失败的时候所采取的行动，最后的选择

When Joe finally decided to book his tickets to Thailand for a Chinese new year vacation,  everything was sold out.
当乔最终决定预定新年假期去泰国的机票的时候，所有票都卖光了。
Instead, he had to go with his backup plan of staying at home and celebrating with friends, which is not a bad last resort.
他不得不选择备用计划，留在家里与朋友庆祝节日，这也不是一个差的最后选择。