A feature that appears as a link next to something you see on Facebook that allows users to let others know they appreciate that something, whether it be a video, a comment or ...
The negative logarithm of the H+ ion concentration. The pH is a measure of the acidity or basic character of a solution. Since it measures a fraction, the larger the pH number, ...
the course of developmental changes through which an organism passes from its inception as a fertilized zygote to the mature state in which another zygote may be produced
21 用語
