SoftMan软件人softadj.柔软的；柔和的；温和的；不强烈的；轻的adv.柔软地；温和地n.柔软的东西soft in the headadj.笨(傻；发疯的)soft emplacement软式发射阵地soft focus image软焦像,柔焦像soft maintenance[计] 软维护soft steel strip低碳钢带soft soil ground软土地基soft-collision软碰撞soft-switching软开关soft gamma-ray软γ线, 软γ射线soft rock lanway软岩巷道

1. A base is the hydroxide of a metal.
   碱是金属的氢氧化物。
2. An acid reacts with a base to form salt and water.
   酸和碱起反应，生成盐和水。