chain drill

短语

词形变化

chain drills 复数 chain drills

释义与例句

n.
  1. 1.

    A classroom technique in which one student asks another a question, who answers and in turn asks the same question to yet another student, continuing until the whole class has both asked and answered.

    教育 语言学
  2. 2.

    A drilling tool that is driven by a rotating chain with attached drill bits or teeth to bore holes.

    工程