The catechism is used for religious instruction.
教义问答法常用于宗教教学。
I lost the instruction book and so I had to find out how to use the machine by trial and error.
我把说明书丢失了，结果只得通过不断摸索才弄懂怎样使用这部机器。
He cites as an example the teaching of the laws of motion in physics, which he says are accessible at an early age when a computer is used to assist in the instruction.
他援引教授物理学方面的一些运动定律为例，说明当计算机用于辅助教学时，学生在幼年就能够理解这些定律。
