"Everything from basic language skills of agreement of subject and verb, use of commas and other punctuation, complete and incomplete sentences, so that we can move from basic writing/language skills to the more sophisticated skills that graduate students, upper level undergraduates and people in the work world use."

VOA: special.2010.02.11

Molecular orbital theory, even at this very basic level, allowed us to predict that no, we're not going to see a true bond here, a strong bond.

即使在最基础的层次，分子轨道理论预计，我们不会看到一个键，一个强的键，。

麻省理工公开课 - 化学原理课程节选

Just the very basic level of the spiral.

这只是整个螺旋的最基本层次。

哈佛公开课 - 幸福课课程节选