Company engineers admit the lead acid battery wasn't technically advanced enough to run a car.

VOA: standard.2010.07.30

You may run into upper-class students, students who are more advanced, you will run into your TA.

你可能会碰上高年级的学生,他们比你的水平要高,当然还有助教

耶鲁公开课 - 基础物理课程节选