A ballpoint pen is adequate for most ordinary purposes.

原珠笔适合的用途。

Keto-enol tautomerism is the most common tautomery phenomenon.Keto -enol themselves are the real chemical substance.

酮及烯醇互变是互变作用的现象,它们都是真实的化学实体。

Signal transmission can be quenched by inhibition of N-acyl-homoserine-lactone, leading to breaking the initial of pathogenic genes transcription and the expression of virulence.

目前发现参这种信息传递的信号分子是N-脂酰高丝氨酸内酯。