respectively是什么意思？

It is estimated that in 2014 the world produced some 42 million metric tons of e-waste discarded electrical and electronic equipment and its parts with North America and Europe accounting for 8 and 12 million metric tons respectively.

They have to give so much thought and attention to the low-level mechanics of handling the ball, or fingering the keys or reading the music, that they are unable to give any thought to the thing that matters—the game, or the music, respectively.