см. тж. в качестве ~а ; видоизменение ; разновидность ; способ
• Once several alternative syntheses have been outlined in this way, the most promising approach can be selected.
• TF 791C/1 is an alternative to ( or a variant of ) the existing TF 79/C.
• The actual method employed was a variation of this method.
• Two versions of the machine are available, the F12-1 for turning only, and the F12-111 for turning and second operations including cross-drilling, slotting, etc.
• A variation of the previous electrode is one in which ...
• Another version of the theory ...