单词add 、plus、 increase 、的区别和用法说下答:add vi.[数]加;增加;加起来;做加法improve, gain, accelerate vt.增加,添加;补充说;计算…总和enhance, boost, jack, mount, hot n.加法,加法运算addition plus n.正号,加号;好处;附加额 benefit, good adj.[数]正的;附加的 additional, attached, positive, more, second increase n....