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CONJ-COORD
加；加上
You say plus to show that one number or quantity is being added to another.
例句
Send a cheque for £18.99 plus £2 for postage and packing...
请寄上18.99英镑的支票，外加2英镑的邮资和包装费。
They will pay about $673 million plus interest.
他们将支付约6.73亿美元再加上利息。
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ADJ
正（数）的；在零以上的
Plus before a number or quantity means that the number or quantity is greater than zero.
例句
The aircraft was subjected to temperatures of minus 65 degrees and plus 120 degrees.
这架飞机经历了零下65度和零上120度的温度变化。
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CONJ-COORD
而且；还有
You can use plus when mentioning an additional item or fact.
例句
There's easily enough room for two adults and three children, plus a dog in the boot...
能宽宽松松容下两个大人、三个孩子，而且后备箱里还可以放只狗。
We had to have an actor who could generate real empathy. Plus he had to carry the audience through a lot of plot.
我们得找一名能真正入戏的男演员，而且他还得能让观众跟上复杂的剧情中。
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ADJ
（用于数字或数量后）多于…的
You use plus after a number or quantity to indicate that the actual number or quantity is greater than the one mentioned.
例句
There are only 35 staff to serve 30,000-plus customers...
只有35名员工，却要为3万多顾客服务。
Among the guests were 16 high-flying executives, all on salaries of £50,000 a year plus.
客人中有16位极为成功的主管，年薪都超过了5万英镑。
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（用于给学生作业评分）好于…的，高于…的
Teachers use plus in grading work in schools and colleges. 'B plus' is a better grade than 'B', but it is not as good as 'A'.
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N-COUNT
有利因素；好处
A plus is an advantage or benefit.
例句
Experience of any career in sales is a big plus...
任何销售领域的工作经验都是一大优势。
There are plenty of plus points about being an older first-time mum.
年龄稍长再做妈妈有很多好处。