对难教的学生你必须坚持诲人不倦的精神。
单片机是一门基础课，但是它既难学又难教。
Single-chip is a basic course, but it is difficult and hard to teach.
我知道他是个难教的孩子，但你必须对他有耐心。
I know he is a difficult child, but you must be patient with him.
对于好的指导师来说，没有任何的东西是难教的。
《程序设计基础》是目前各高校信息工程类专业普遍开设的一门课程，它具有内容多、理论与实践结合紧密的特点，是一门难教难学的基础课程。
The course Fundamentals of Programming is one of the basic courses for college students majoring in information. It has many contents and close relationship with practice.
教老狗耍把戏，难哉(人老则守旧)。
一个吹笛的导师尝试教两个吹笛者吹笛。那两个学吹笛的问导师：“吹笛难，还是教两个学吹笛的人吹笛难呢？”
A tutor who tooted a flute tried to tutor two tooters to toot. Said the two to their tutor, "Is it harder to toot or to tutor two tooters to toot?"
那两个学吹笛的问导师：吹笛难，还是教两个学吹笛的人吹笛难呢？
Said the two to their tutor, Is it harder to toot or to tutor two tooters to toot?
那两个学吹笛的问导师：缄“吹笛难，还是教两个学吹笛的人吹笛难呢？”
Said the two to their tutor, "Is it harder to toot or to tutor two tooters to toot?"
那两个学吹笛的问导师：缄“吹笛难，还是教两个学吹笛的人吹笛难呢？”
Said the two to their tutor, "Is it harder to toot or to tutor two tooters to toot?"
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