他们的拇指一定很酸。
妈妈：葡萄还没熟，一定很酸。
妈妈：葡萄一定很酸。
玻璃电极中的电解质是具有一定浓度的酸溶液。
The electrolyte within the glass electrode is an acid solution of definite strength.
匀染剂、酸剂对变色效果有一定的影响。
Dye leveller and acid agent have a certain influence on the effect of colour change.
而当酸和盐用量达到一定值后，此效果被酸和盐明显的促染作用所取代。
However, the effect is lost when the acid and salt reach a certain amount.
电极中的电解质是具有一定浓度的酸溶液。
The electrolyte within the glass electrode is an acid solution of definite strength.
电极中的电解质是具有一定浓度的酸溶液。
The electrolyte within the glass electrode is an acid solution of definite strength.
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