Endoresment after date has been a difficult point in note theory.

期后背书是票据法中的一个理论难点.

The tense teaching is a difficult point in English grammar teaching.

英语语法教学中时态的教学是一个难点。

The use of the Chinese is a difficult point for K or ean students.

汉语“了”的用法是韩国学生学习汉语的一个难点。

The sequence of past participle in compound tenses is a key point as well as a difficult point in French grammar.

复合时态中过去分词的配合是法语语法中的一个重点，也是一个难点。

How to get the limit of the dual function is a difficult point in advanced maths.

极限是高等数学教学中的一个难点 ，而极限理论又是研究连续、导数等内容的重要工具。

Joint crime is an important problem in Criminal Law, and fagin is a difficult point.

共同犯罪问题是刑法中的一个重要问题，而教唆犯问题又是其中一个难点。

Measure word is a difficult point and the weak tache on Chinese teaching for foreigners.

量词教学是对外汉语教学中的难点，也是一个比较薄弱的环节。

The judgment of transitive binary relation is a difficult point in discrete mathematic.

可传递二元关系的判定是离散数学中的一个难点。

The design of mechanism pumping crossed cores is a difficult point in die casting moulds.

抽拔交叉型芯机构设计是压铸模设计的难点之一.

In TCSL intonation teaching and learning, neutral tone is a focus as well as a difficult point.

对外汉语语音教学中，轻声是语音教学的重点和难点。