instruction:
Translate the given Spanish text to English
question:
Foot cover for childrens pushchairs.
answer:
CUBREPIES PARA COCHES-SILLA INFANTILES.


question:
In this way, an optical tracker and the associated cameras are not necessary.
answer:
De esta manera, se puede prescindir de un rastreador óptico y de las cámaras asociadas.


question:
Second, the nanoscopic entities are invisibly small.
answer:

Segundo, las entidades nanoscopicas son invisiblemente pequenas.