4 sentences

1. 周一发生了什么变化？

   zhōu​yī fā​shēng le shén​me biàn​huà?

   What changed on Monday?

   Source: CCMatrix

2. 心脏病最容易在星期一发作。

   xīn​zàng​bìng zuì róng​yì zài xīng​qī​yī fā​zuò.

   Heart attacks are most likely to occur on Mondays.

   Source: CCMatrix

3. 这一发明最初并没有得到广泛应用。

   zhè yī fā​míng zuì​chū bìng méi​yǒu dé dào guǎng​fàn yìng​yòng.

   This invention was not widely used at first.

   Source: CCMatrix

4. 这一发现是好消息――如果你是一只老鼠。

   zhè yī fā​xiàn shì hǎo​xiāo​xi―― rú​guǒ nǐ shì yī zhī lǎo​shǔ.

   This finding is good news – if you are a mouse.

   Source: CCMatrix