These machines are older models and have to be operated BY HAND
A. Automatically
B. Mechanically
Imo, "mechanically" is more suited because of "These machines"
Could you help me see the difference of these words?
The question is unclear to me. Is the word "automatically" or "mechanically" supposed to replace "BY HAND"? If not, then what?
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The question is unclear to me. Is the word "automatically" or "mechanically" supposed to replace "BY HAND"? If not, then what? What exactly is the relationship supposed to be between the two words and the original sentence?