Since many caterpillar species are known to produce this enzyme, it may play an important role in the long-term evolutionary struggle between bugs and plants.

How are we going to sustain such a large, long-term struggle if we are a divided country?

"We'll support freedom fighters who are prepared to engage in a long-term struggle."

The term is used by Maoists for their strategy of long-term armed revolutionary struggle.

All of the resources of the nations involved may be mobilized as part of a long-term struggle.

Government officials acknowledge that they face a long-term struggle against what they describe as "a tiny number of separatists."

"The psychological pressure has become enormous since people moved out of a kind of survival mode into the reality of a long-term struggle."

The struggle imposed on us is, by nature, a long-term struggle.

That is a long-term struggle, but it is something worth fighting for.

Mr. Sharon's aides say the war on Palestinian violence is a long-term struggle.