be unable to do

基本解释

In times of globalization and internationalization, we will be unable to do anything without unity.
在一个全球化、国际化的时代，离开了团结和合作，我们将寸步难行。
Meanwhile the UI developers need a server that can be trusted to be stable at all times otherwise they will be unable to do their own work.
同时，UI开发人员需要一台可信的服务器，能够一直保持稳定，否则他们就无法完成自己的工作。
In India, hawks respond to the violence by saying that Pakistan is unwilling to turn off the terrorists, as it has promised; Indian doves say it must be unable to do this.
在印度，强硬派对于此次爆炸的反应是：尽管已经许诺，蛤巴基斯坦并没有打击恐怖分子的诚意。温和派则明认为巴方肯定也是有自己的苦衷。

Go back and find anything whose performance matches this and you will be unable to do so.
FORBES: Apple Reaches The Outer Limits