2 sentences

1. “丶”是汉字的基本笔画之一。

   “ zhǔ” shì hàn​zì de jī​běn bǐ​huà zhī​yī.

   '丶' is one of the basic strokes of Chinese characters.

   Source: Dong Chinese Dictionary

2. 老师正在黑板上演示“乙”这个笔画的正确写法。

   lǎo​shī zhèng​zài hēi​bǎn shàng yǎn​shì“ zhé” zhè​ge bǐ​huà de zhèng​què xiě​fǎ.

   The teacher is demonstrating the correct way to write the stroke 'yi' on the blackboard.

   Source: Dong Chinese Dictionary