Somebody's hands are tied 无能为力

表达“to jump ship 跳船”源自航海，旧时的海员需要和自己所在的船同生共死，即使船就要沉入海底也不能弃船而逃。现在，“to jump up”用来指“一个人在其所处团队、公司等遇到困难时，辞职或离开原本的职位，甚至是换到与前东家有竞争关系的组织中去”。

例句

When I found out that the company was losing money, I jumped ship and found a new job.
当我发现那家公司正在赔钱时我就辞职不干了，去找了一份新工作。

I know it’s been a really tough year – but please don’t jump ship yet. We’ll get through this together as a team.
我知道今年很不容易，但请大家先别离开。作为一个团队，我们会一起渡过难关的。

After losing four matches in a row, several of the players jumped ship and joined other teams.
在连输四场比赛后，好几名队员离开去了其它球队。