а пока

• We shall revert to this subject in a later paragraph; for the moment we assume that ...

• We will learn how to develop such equations in the next chapter; for now, we may rely on a set of tabulated equations given in Appendix D.

• The rms speed is different from ... ; for the present, the value of √u will be taken as indicative of ...

• For the time being, draw all plate boundaries as single lines, without any distinction as to the type of boundary each represents.