Jìyì de xuǎnzéxìng ràng wǒmen qīngxiàng yú jìzhù kuàilè de shìqíng.
The selective nature of memory causes us to tend to remember happy things.
Tips
grammar
选择性 follows the pattern verb+性 to form nouns describing a characteristic or tendency. Other examples: 可能性 (kěnéngxìng, possibility), 灵活性 (línghuóxìng, flexibility). The suffix 性 nominalizes the preceding verb or adjective.
