2 sentences

1. 这种巧克力是用心形模子做的。

   zhè zhǒng qiǎo​kè​lì shì yòng xīn​xíng mú​zi zuò de.

   This chocolate was made using a heart-shaped mold.

   Source: Dong Chinese Dictionary

2. 这种植物最显著的特征是它的叶子呈心形。

   zhè zhǒng zhí​wù zuì xiǎn​zhù de tè​zhēng shì tā de yè​zi chéng xīn​xíng.

   The most distinctive feature of this plant is its heart-shaped leaves.

   Source: Dong Chinese Dictionary