To further confirm their results, the researchers grew bacterial colonies near wells filled with a solution of ammonia and found the same slime gradient.

为了进一步确认这一实验结果，研究人员在孔附近充满氨溶液的培养基种培养细菌菌落，发现了同样的粘液梯度。

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Again and again, the bacterial colonies oozed slime in response to ammonia.

反复数次，作为对氨的回应，细菌菌落总是会产生渗出粘液。

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