4 sentences

1. 他总是把竞争对手当作假想敌。

   tā zǒng​shì bǎ jìng​zhēng duì​shǒu dàng​zuò jiǎ​xiǎng dí.

   He always treats his competitors as imaginary enemies.

   Source: Dong Chinese Dictionary

2. 一位瑞士科学家以她的名字命名了一颗假想的恒星。

   yī wèi Ruì​shì kē​xué​jiā yǐ tā de míng​zi mìng​míng le yī kē jiǎ​xiǎng de héng​xīng.

   A Swiss scientist named a hypothetical star after her.

   Source: OpenSubtitles

3. 我们可以假想一下未来城市的样子。

   wǒ​men kě​yǐ jiǎ​xiǎng yī​xià wèi​lái chéng​shì de yàng​zi.

   We can imagine what the cities of the future will look like.

   Source: Dong Chinese Dictionary

4. 科学家们对恐龙灭绝提出了一种假想。

   kē​xué​jiā men duì kǒng​lóng miè​jué tí​chū le yī zhǒng jiǎ​xiǎng.

   Scientists have proposed a hypothesis regarding the extinction of dinosaurs.

   Source: Dong Chinese Dictionary