2 sentences

1. 这种药水可以使头发的生长速度倍增。

   zhè zhǒng yào​shuǐ kě​yǐ shǐ tóu​fa de shēng​zhǎng sù​dù bèi zēng.

   This lotion can double the growth rate of hair.

   Source: Dong Chinese Dictionary

2. 听到这个好消息，大家的工作热情也随之倍增。

   tīng​dào zhè​ge hǎo xiāo​xi, dà​jiā de gōng​zuò rè​qíng yě suí zhī bèi zēng.

   Upon hearing the good news, everyone's enthusiasm for work doubled.

   Source: Dong Chinese Dictionary