add in 与add on有什么区别

add on (在计算或目录的末尾额外)加上,附加

Here is your bill; we've added on the five per cent service charge.这是您的账单,我们已把5％的服务费加进去了.

add in 加进去,计算在内; 包括

If there is going to be a study group,please don't forget to add me in.要是成立学习小组,别忘了把我算进去.

inside and on the round