Plus before a number or quantity means that the number or quantity is greater than zero.
The aircraft was subjected to temperatures of minus 65 degrees and plus 120 degrees.
这架飞机经受过零下65度和零上120度的考验。
You use plus after a number or quantity to indicate that the actual number or quantity is greater than the one mentioned.
There are only 35 staff to serve 30,000-plus customers.
只有35名员工为3万多位顾客服务。
Teachers use plus in marking work in schools and colleges. 'B plus' is a better mark than 'B', but it is not as good as 'A'.
You say plus to show that one number or quantity is being added to another.
$5 for a small locker, plus a $3 deposit.
带锁的小柜子5美元,外加3美元的押金。
36 plus 5 squared is 61.
5的平方加36是61。
You can use plus when mentioning an additional item or fact.
There's easily enough room for two adults and three children, plus a dog in the trunk.
有足够的空间容纳两个大人和三个小孩。另外,行李箱里还能容纳一只狗。
pluses , plusses
A plus is an advantage or benefit.
Well-known figures would be a big plus for the new board.
名人会成为新董事会的一大优势。