Getting a grade like a B-plus or a C-minus adds or subtracts a few tenths of a point.

VOA: special.2009.03.05

So we can have, if we have the final quantum number m equal plus 1 or minus 1, we're dealing with a p x or a p y orbital.

所以如果我们有,磁量子数ｍ等于正负１,我们讨论的就是ｐｘ或者ｐｙ轨道。

麻省理工公开课 - 化学原理课程节选

Anything where you're actually keeping track of something like a score that's having a variable that you increment -- plus, plus, or decrement, minus, minus, using the appropriate puzzle piece could certainly be compelling.

你需要保存像分数这样的事物时,你就需要一个变量,它可以自加，++，或者自减,要使用正确的拼图。

哈佛公开课 - 计算机科学课程节选

The survey's overall sampling error is plus or minus 3 percentage points and plus or minus 6 percentage points for the African-Americans sample.

CNN: STORY HIGHLIGHTS

This one showed Bush drawing 49 percent to Kerry's 48 percent in a hypothetical matchup, well within the poll's margin of error or plus or minus 4 percentage points.

CNN: Democrats battle for Tennessee, Virginia

The margin of error for poll results among registered voters who say they are Democrats or lean Democratic was plus or minus 5 percentage points.

CNN: Poll: Saddam's capture boosts Bush's ratings