3 sentences

1. 纳斯达克指数今天创下了历史新高。

   Nà​sī​dá​kè zhǐ​shù jīn​tiān chuàng​xià le lì​shǐ xīn​gāo.

   The Nasdaq index hit a record high today.

   Source: Dong Chinese Dictionary

2. 股市今天的收盘点位创下历史新高。

   gǔ​shì jīn​tiān de shōu​pán diǎn​wèi chuàng​xià lì​shǐ xīn​gāo.

   The stock market hit a record closing high today.

   Source: Dong Chinese Dictionary

3. 受冷空气影响，今天的气温创下了入冬以来的新高。

   shòu lěng kōng​qì yǐng​xiǎng, jīn​tiān de qì​wēn chuàng​xià le rù​dōng yǐ​lái de xīn​gāo.

   Affected by cold air, today's temperature hit a new high for this winter.

   Source: Dong Chinese Dictionary