“加”用plus,and或add表示;“等于”用is,make,equal等词表示。
2+3=? 可表示为: How much is two plus three?
2+3=5
Two plus three is five.
Two and three is equal to five.
Two and three make five.
Two added to three equals five.
If we add two to/and three, we get five.
可见,add是动词:
vt.
增加, 添加, 计算...总和, 补充说, 又说
vi.
加, 加起来, 增添, 做加
plus 作"相加"解时,它是介词,后面不能加其它东西.
adj.
正的, 加的
n.正号...
参考资料:http://zhidao.baidu.com/question/2748640.html