3 sentences

1. 群表象理论在物理学中非常重要。

   qún biǎo​xiàng lǐ​lùn zài wù​lǐ​xué zhōng fēi​cháng zhòng​yào.

   Group representation theory is very important in physics.

   Source: Dong Chinese Dictionary

2. 我们不能仅仅被事物的表象所迷惑。

   wǒ​men bù néng jǐn​jǐn bèi shì​wù de biǎo​xiàng suǒ mí​huo.

   We shouldn't be misled solely by the outward appearance of things.

   Source: Dong Chinese Dictionary

3. 记忆表象是过去感知过的事物在头脑中的再现。

   jì​yì biǎo​xiàng shì guò​qù gǎn​zhī guo de shì​wù zài tóu​nǎo zhōng de zài​xiàn.

   A memory image is the reproduction in the mind of something perceived in the past.

   Source: Dong Chinese Dictionary