1.Time for executing some operation depend (on?)(rate of computer ‘- here?’)not only (rate of computer ‘– or here?’), but (on?) pace of data input.
2.A computer can save the bulk of information; it used for translating. - как сложить это сложное предложение?
3.Computer may control itself, so it makes opportunity for using a computer as a translator.
"Are these correct?"
(I am not quite sure what you are meaning here by "translate".)
#1 The length of time required to execute some operations depends on the rate/speed of the computer as well as the speed of data input.
#2 The bulk of the information can be saved on the computer and used for translation.
#3 The computer can operate on its own so it can be used as a translator