• The copper is protected from air while molten.

I

см. тж. а ~; до настоящего времени; до сих пор; на некоторое время

• Disregarding the horizontal movements ... , consider for the moment only the lifting of ...

• For the time being (or For the present) we are interested primarily in ideas and not particularly in details.

• This ratio has thus far been determined only in the case of ...

• The physiologic importance of glucose will be discussed under biologic chemistry. For now, let us say that glucose is used in ...

• Up to now (or Until now, or So far, or Up to the present, or As yet), there has been no detailed work done to find ...

II

см. тж. до тех пор ~

• This is not found to be true experimentally as long as the similar atoms are otherwise equivalent.

• As long as the energy is high enough, its particular value is irrelevant in determining ...

III

• It is desirable to burn the mixture while the piston is near top centre position.