Army officers said the situation was under control.

军方官员说局势已得到控制。

There's no need to flap—I've got everything under control.

不必担心—一切都已在我控制之中。

We've got to get the economy under control or it will literally eat us up.

我们必须控制住经济，否则它真地就会把我们困住。

He believes that from a military standpoint, the situation is under control.

他认为从军事角度来看，局势已得到控制。

This goes together with planning: you turn a big and hairy project into a set of small furry balls you can always keep under control.

这与计划是相辅相成的：你要把一个庞大而棘手的项目变成一堆你总能控制住的毛茸茸的小球。