长期以来，世界上各个国家投入了大量的精力及财力来研究波浪能，并研制出了

长期以来，世界上各个国家投入了大量的精力及财力来研究波浪能，并研制出了多种波浪能发电装置。

結果 (英文) 1:

For a long time, various countries in the world put a lot of energy and financial resources to study wave energy, and developed a variety of wave energy generation devices.

結果 (英文) 2:

Long-term since, all countries of the world into the energy and financial resources to the study of wave energy, and developed a variety of wave power generation device.

結果 (英文) 3:

A long time, all countries in the world have invested considerable energy and resources to research on wave energy, and developed a variety of wave energy generation devices.