The Pentagon also wants to improve existing nuclear weapons and possibly develop new ones.

It also says nuclear testing is necessary to insure the reliability of old weapons and to develop new ones.

Among other things, complementary operations for existing programs and technical skill to develop new ones.

Flat solid type plates were known since 1795, but it took another 50 years to develop curved ones.

They hope to encourage the broadcasters to keep working at developing better ones.

Apple promised to provide assistance to the community in its efforts to extend such tools and develop new ones.

Pigeon Corporation has continued to improve its existing products and develop new ones.

Researchers have rushed to test existing drugs against the virus and to begin to develop new ones.

Everyone wants to change their schools and develop new ones, but teacher education is still training teachers for the old ones.

"I look forward to many opportunities to explore our common interests, and to develop new ones with her."