Đặt câu với từ "blackboard"

1. Okay, well Mrs. Jost called me again about you squinting at the blackboard all day.

Mrs. Jost hat mich wieder angerufen und erzählt, wie du den ganzen Tag auf die Tafel schielst.

2. The teacher can write arithmetical formulas on the electronic blackboard, which are evaluated automatically by a computer algebra system.

Damit kann der Dozent arithmetische Formeln schreiben, die von einem Computer-Algebra-System, wie z.B.