“二选一地”可以翻译为 “a situation where one has to choose between two alternatives” ，不过在日常表达或更简洁的语境中，也可说成 “a choice between two options” 。
This is a situation where one has to choose between two alternatives: either stay here and keep working, or leave and start a new life elsewhere.
这就是个二选一的情况：要么留在这里继续工作，要么离开去别处开启新生活。
We're faced with a choice between two options: accept the offer or turn it down.
我们面临一个二选一的局面：接受这个提议，或者拒绝它。