Sentence:  In <WSD>gassy</WSD> curds, the condition that promotes the generation of gas, is opposed to the condition that favors the development of acid, and "vice versa". Therefore, I believe the secret of making good cheese from <WSD>gassy</WSD> curds is to promote the development of lactic acid. 
Meaning of the word marked with <WSD> tags:  Having the nature of, or containing, gas.